SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

                                   FORM 8-K


                                CURRENT REPORT

                                 -------------

                    Pursuant to Section 13 or 15(d) of the
                        Securities Exchange Act of 1934


      Date of Report (Date of earliest event reported): January 25, 1999

                             SL GREEN REALTY CORP.
            (Exact name of Registrant as specified in its Charter)




                                   Maryland
                           (State of Incorporation)



         1-13199                                   13-3956775
(Commission File Number)                       (IRS Employer Id. Number)


                              70 West 36th Street           10018
                              New York, New York         (Zip Code)
                   (Address of principal executive offices)

                                (212) 594-2700
             (Registrant's telephone number, including area code)





ITEM 2.  ACQUISITION OR DISPOSITION OF ASSETS

     SL  Green  Realty  Corp.  (the   "Company"),   through  its  wholly-owned
affiliate,  Green W. 57th Street, LLC, has acquired controlling interests in a
property involving a significant amount of assets from Blackacre 555 West 57th
Street, MM LLC and Blackacre 555 West 57th Street, LLC.

     555 West 57th Street.  On January 25, 1999,  the Company  purchased a 65%
controlling  interest in 555 West 57th Street,  New York,  New York ("555 West
57th")  for an  aggregate  purchase  price  of  approximately  $66.7  million,
including $38.1 million in assets and $28.6 million in assumed debt.

     555 West 57th is a 20-story Midtown  Manhattan  property known as the BMW
Building.  The property is located on the easterly  block front of 11th Avenue
between West 57th and West 58th Streets in Manhattan's midtown west submarket.
The property  contains  941,000 square feet of rentable space (including three
subgrade  floors,  two of which  comprise a 190-car  garage).  The property is
currently 98% leased.

     BMW,  the primary  tenant,  occupies  19% of the  floorspace,  or 183,000
square feet.  555 West 57th was originally  built in 1971 as the  headquarters
for Ford  Motor  Company.  Now the  building  is home to BMW's  U.S.  flagship
offices,  service center and showroom.  Other tenants include:  CBS, Inc., The
City  University of New York, St. Luke's  Roosevelt  Hospital,  the Greater NY
Hospital  and  Ticketmaster.  Many  tenants  have signed  long-term  leases as
evidenced by the fact that 65% of existing leases expire beyond 2008.

     The  purchase  price of 555 West 57th was funded with  proceeds  from the
Senior Unsecured Revolving Line of Credit Agreement between SL Green Operating
Partnership,  L.P. and SL Green Realty Corp. and Lehman Brothers Holdings Inc.
D/B/A  Lehman   Capital,   a  Division  of  Lehman   Brothers   Holdings  Inc.
(individually  as a Co-Lender and as Agent for one or more  Co-Lenders  and as
Syndication Agent). This Credit Facility is dated as of December 18, 1997.





ITEM 7.  FINANCIAL STATEMENTS AND EXHIBITS

(a) and (b)  Financial Statements of Property Acquired
             and Pro Forma Financial Information

The financial statements and pro forma financial  information required by Item
7(a) and 7(b) are currently being prepared and it is therefore  impractical to
provide  this  information  on the date  hereof.  The  Company  will  file the
required  financial  statements and  information  under cover of Form 8-K/A as
soon as practicable but in no event later than 60 days after the date on which
this Form 8-K was required to be filed.

(c)   Exhibits

2.1   Form of Agreement of Sale and Purchase between Blackacre 555 West 57th 
      Street MM LLC and Blackacre 555 West 57th Street LLC, as Sellers, and SL
      Green Operating Partnership, L.P., as Purchaser.

2.2   Form of Amendment to Sale and Purchase Agreement between Blackacre 555 
      West 57th  Street MM LLC and  Blackacre  555 West 57th  Street  LLC,  as
      Sellers, and SL Green Operating Partnership, L.P., as Purchaser.

2.3   Form of Assignment and Assumption of Membership Interest between 
      Blackacre 555 West 57th Street LLC, as Assignor,  and Green W. 57th St.,
      LLC, as Assignee.

2.4   Form of Assignment and Assumption of Sale and Purchase Agreement between 
      SL Green Operating  Partnership,  L.P., as Assignor, and Green West 57th
      St., LLC, as Assignee.







                                  SIGNATURES

         Pursuant to the requirements of the Securities  Exchange Act of 1934,
the  registrant  has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                    SL GREEN REALTY CORP.



                                    By:      /s/ David J. Nettina
                                       --------------------------
                                       David J. Nettina
                                       President and Chief Operating Officer







Date  February 8, 1999







 ============================================================================


                            SALE-PURCHASE AGREEMENT

                                    between

                     BLACKACRE 555 WEST 57TH STREET MM LLC
                    and BLACKACRE 555 WEST 57TH STREET LLC,
                                    Sellers

                                      and

                     SL GREEN OPERATING PARTNERSHIP, L.P.,
                                   Purchaser








                         Dated: As of October __, 1998



 ============================================================================





                               TABLE OF CONTENTS

                                                                           Page

1. Sale and Purchase of Membership Interests.................................2

2. State of Title............................................................2

3. Purchase Price and Payment................................................3

4. Closing...................................................................4

5. Representations and Warranties of Sellers and Purchaser...................5

6. Title Matters Affecting the Property; Exceptions to Title................14

7. As Is; Access to Property During Contract Period; Operation of Property..18

8. Apportionments, Adjustments and Credits..................................20

9. Closing Deliveries.......................................................25

10. Conditions to Closing Obligations.......................................28

11. Consent of Mortgagee....................................................30

12. BMW Purchase Option.....................................................33

13. Ford Note...............................................................35

14. Confidentiality.........................................................36

15. Limitation on Liability of Parties......................................37

16. Fire or Other Casualty; Condemnation....................................38

17. Brokerage...............................................................40

18. Closings Costs; Fees and Disbursements of Counsel, etc..................40

19. Notices.................................................................40

20. Survival; Governing Law.................................................42

21. Counterparts; Captions..................................................42

22. Entire Agreement; No Third Party Beneficiaries..........................42

23. Waivers; Extensions.....................................................42

24. No Recording............................................................42

25. Assignments.............................................................43

26. Pronouns; Joint and Several Liability...................................43

27. Successors and Assigns..................................................43

28. Escrow..................................................................43

29. Tax Proceedings.........................................................46

30. Leasing.................................................................47

31. Indemnity for Certain Transfer Taxes....................................47

32. Further Assurances......................................................48

EXHIBITS
- --------

A.       Legal Description of the Property
B.       Escrow Agent Wire Instructions
B-1      Form of Bank of Boston Letter of Credit
B-2.     Ford Note
C.       Operating Agreement of Nominee LLC
D.       Operating Agreement of Associates LLC
E.       TIC Agreement
F.       Property Management and Leasing Agreement
G.       Space Leases
H.       Rent Roll
I.       Tenant Improvement Allowances
J.       Payable Commissions
J-1.     Material Litigation
K.       Employees
L.       Mobil Indemnity
M.       Ford Indemnity
N.       Tax Certiorari Proceedings
O.       Service Contracts and Utility Deposits
P.       5th and 6th Floor Office Conversion
P-1.     Co-Brokerage Agreement
Q.       Permitted Title Matters of Record
R.       Form of Assignment and Assumption of Membership Interest
S.       Form of Estoppel
T.       Form of Amendment to Operating Agreement
U.       Form of Non-Imputation Affidavit
V.       Form of License Agreement
V-1.     Form of Subordinate Assignment of Interest in Note and Rights to
         Receive Distributions
V-2.     Form of UCC-1

SCHEDULES
- ---------
1.       Balance Sheet of the Company







                            SALE-PURCHASE AGREEMENT


          THIS SALE-PURCHASE  AGREEMENT (the "Agreement"),  dated as of October
__,  1998,  by and among  BLACKACRE  555 WEST 57TH  STREET MM LLC,  a  Delaware
limited liability company,  having an office c/o Blackacre Capital  Management,
LLC,  450 Park  Avenue,  New  York,  New York  10022  ("Blackacre  MM LLC") and
BLACKACRE  555 WEST 57TH  STREET  LLC, a Delaware  limited  liability  company,
having an office c/o Blackacre Capital  Management,  LLC, 450 Park Avenue,  New
York,  New York 10022  ("Blackacre  LLC" and,  together with  Blackacre MM LLC,
individually, a "Seller" and, collectively,  "Sellers"), and SL GREEN OPERATING
PARTNERSHIP, L.P., a Delaware limited partnership,  having an office at 70 West
36th Street, New York, New York 10018-8007 ("Purchaser").


                              W I T N E S S E T H:


          WHEREAS,  555 West 57th LLC is a Delaware limited  liability  company
(the "Company") formed pursuant to that certain (a) Certificate of Formation of
555 West  57th LLC,  dated  August  19,  1997,  and filed in the  Office of the
Secretary of State of the State of Delaware on August 20, 1997, and (b) Amended
and Restated Limited Liability Company Agreement of 555 West 57th LLC, dated as
of October 30, 1997 (the "Company's Operating Agreement"); and

          WHEREAS,   the  Company   owns  (a)  a   sixty-four   percent   (64%)
tenancy-in-common  interest in that certain  parcel of improved  real  property
known as 555 West  57th  Street,  New  York,  New  York,  as more  particularly
described  in  Exhibit  A  attached  hereto  and made a part  hereof  (the real
property,  together  with all  personal  property  located  at  and/or  used in
connection with such real property and owned in whole or in part by the Company
(but  expressly  excluding  any  personal  property of space  tenants or leased
property),  being collectively  referred to herein as the "Property"),  and (b)
all of the membership  interests in 555 West 57th  Associates,  LLC, a Delaware
limited liability company ("Associates LLC"); and

          WHEREAS, Associates LLC owns a 1% general partnership interest in 555
W. 57th Associates,  a New York general partnership ("57th Associates"),  and a
2.875%  membership  interest in 555 West 57th Nominee  LLC, a Delaware  limited
liability company ("Nominee LLC"); and

          WHEREAS,  Blackacre MM LLC is the sole managing member of, and owns a
one percent (1%) interest in, the Company  pursuant to the Company's  Operating
Agreement; and

          WHEREAS,  Blackacre  LLC is a  non-managing  member  of,  and  owns a
ninety-nine  percent (99%)  interest in, the Company  pursuant to the Company's
Operating Agreement; and

          WHEREAS, Blackacre MM LLC desires to sell to Purchaser, and Purchaser
desires to purchase from Blackacre MM LLC,  Blackacre MM LLC's one percent (1%)
interest in the  Company,  together  with all of  Blackacre MM LLC's rights and
obligations  associated with such membership interest being sold hereunder (the
"Blackacre MM LLC Interest") on the terms and conditions set forth herein; and

          WHEREAS,  Blackacre LLC desires to sell to  Purchaser,  and Purchaser
desires to purchase from Blackacre LLC,  Blackacre  LLC's  ninety-nine  percent
(99%) interest in the Company,  together with all of Blackacre LLC's rights and
obligations  associated with such membership interest being sold hereunder (the
"Blackacre  LLC  Interest"  and,  together  with the Blackacre MM LLC Interest,
being  sometimes  hereinafter  referred  to  as,  individually,  a  "Membership
Interest"  and,  collectively,  the  "Membership  Interests")  on the terms and
conditions set forth herein; and

          WHEREAS,  in connection  with the sale and purchase of the Membership
Interests,  the Company's  Operating  Agreement is being  amended  concurrently
herewith to reflect the transfer of the Membership Interests,  the admission of
Purchaser or its designees as the managing  member and  non-managing  member or
members of the Company and the withdrawal of Blackacre MM LLC and Blackacre LLC
as members of the Company, all as more fully set forth herein.

          NOW, THEREFORE,  for Ten Dollars ($10.00) and other good and valuable
consideration,  the receipt and sufficiency of which is hereby  acknowledged by
Sellers  and  Purchaser,  and in  consideration  of the  mutual  covenants  and
agreements herein set forth, the parties hereto hereby agree as follows:

     1.   Sale and Purchase of Membership Interests.

          1.1  Blackacre MM LLC hereby  agrees to sell and assign to Purchaser,
and Purchaser  hereby agrees to purchase and acquire from Blackacre MM LLC, the
Blackacre MM LLC Membership Interest.

          1.2 Blackacre LLC hereby agrees to sell and assign to Purchaser,  and
Purchaser  hereby  agrees to  purchase  and acquire  from  Blackacre  LLC,  the
Blackacre LLC Membership Interest.

     2.   State of Title.

          2.1  Each  Seller  shall  convey  to  Purchaser  good  title  to  its
Membership  Interest,  free  and  clear  of all  liens,  claims,  encumbrances,
pledges,  hypothecations and charges, except for any liens or encumbrances held
by Greenwich Capital (as hereinafter  defined) in respect of the Greenwich Loan
(as hereinafter defined).

     3.   Purchase Price and Payment.

          3.1 The purchase price (the "Purchase  Price") payable to Sellers for
the Membership Interests shall be, in the aggregate, $37,525,000.00, subject to
(a)  reduction  as  provided  in  Articles  12 and 13 hereof,  (b) any  credits
Purchaser may be entitled to in respect of any Additional Cash Downpayments (as
defined in Section 4.3  hereof)  under  Section 4.3 hereof,  and (c) subject to
such other apportionments,  adjustments and credits as are provided in Articles
6, 8, 10 and 29 hereof.

          3.2 The Purchase Price shall be payable as follows:

               3.2.1  (a)  $3,752,500.00,   payable  concurrently  herewith  in
immediately  available funds, by federal funds wire transfer ("Wire Transferred
Funds") to Solomon and Weinberg LLP, as escrow agent ("Escrow  Agent") pursuant
to the instructions (the "Wire  Instructions")  set forth on Exhibit B attached
hereto  and  made a part  hereof  (the  "Downpayment"),  the  receipt  of which
Downpayment is hereby  acknowledged by Escrow Agent.  The Downpayment  shall be
held by Escrow Agent and disbursed in accordance  with the terms and conditions
of this Agreement.  Except as provided in Section  3.2.1(b) below, any interest
earned on the  Downpayment  shall be deemed to be part of the  Downpayment  and
shall be paid together with the principal portion of the Downpayment,  it being
understood and agreed that any interest earned on the Downpayment  shall not be
credited to the Purchase Price upon Closing (as hereinafter defined) and shall,
upon Closing, be and remain the property of Seller.

                    (b)  At any time after the date hereof  until the date that
is  fifteen  days (15)  prior to any  scheduled  Closing  Date (as  hereinafter
defined),  Purchaser  may, at  Purchaser's  option,  deliver to Escrow  Agent a
clean,  irrevocable,  non-documentary and unconditional letter of credit naming
Sellers as beneficiary in the amount of $3,752,500.00  issued by and drawn upon
BankBoston,  N.A.  (hereinafter  referred to as the "Issuing Bank") in the form
attached hereto as Exhibit B-1 (the "Downpayment  Letter of Credit"),  the term
of which Downpayment Letter of Credit shall not expire prior to March 15, 1999,
and which  Downpayment  Letter of Credit shall be deemed to be a substitute for
the Downpayment  hereunder.  In the event that Purchaser  elects to deliver the
Downpayment  Letter of Credit,  Escrow  Agent  shall  return to  Purchaser  the
Downpayment  deposited  with Escrow  Agent  pursuant to Section  3.2.1(a),  but
Escrow  Agent shall retain in escrow all interest  earned  thereon  through the
date that the Downpayment is returned to Purchaser under this Section 3.2.1(b),
as well as all interest  thereafter  earned on such interest (all such interest
retained by Escrow Agent if Purchaser  substitutes  the  Downpayment  Letter of
Credit under this Section 3.2.1 being hereinafter referred to, collectively, as
the "Downpayment Interest").  The Downpayment Letter of Credit shall be held by
Escrow Agent and delivered in accordance  with the terms and conditions of this
Agreement. The Downpayment Interest shall not be credited to the Purchase Price
upon Closing (as hereinafter  defined) and shall,  upon Closing,  be and remain
the property of Sellers.

               3.2.2 If Purchaser  has (a) not  provided  Escrow Agent with the
Downpayment  Letter of Credit,  the balance of the Purchase Price in the amount
of  $33,772,500.00  shall be paid to  Sellers  on the date of  Closing,  or (b)
provided  Escrow  Agent  with the  Downpayment  Letter of  Credit,  the  entire
Purchase Price in the amount of $37,752,500.00  shall be paid to Sellers on the
date of Closing, in either case, subject to the apportionments, adjustments and
credits  referenced in Section 3.1 above,  to be paid  simultaneously  with the
delivery of the Assignments (as hereinafter  defined) in Wire Transferred Funds
to an  account  at such  bank or banks as shall be  designated  by  Sellers  by
written  notice to Purchaser at least one (1) business day prior to the date of
Closing and upon the Closing,  if Purchaser has provided  Escrow Agent with the
Downpayment Letter of Credit, Escrow Agent shall contemporaneously  deliver the
Downpayment Letter of Credit to Purchaser at the Closing.

          3.3 Subject to Section 28.1.3,  whenever in this Agreement  Purchaser
is entitled to a return of the Downpayment,  Purchaser shall be entitled to the
return of the Downpayment and any Additional Cash  Downpayments (as hereinafter
defined)  actually  being  held by Escrow  Agent  pursuant  to this  Agreement,
together with all interest earned thereon (including,  without limitation,  any
Downpayment  Interest),  and to the return of any Downpayment  Letter of Credit
and Additional  Downpayment  Letters of Credit (as hereafter  defined) actually
delivered  to  Escrow  Agent.  Subject  to  Section  28.1.3,  whenever  in this
Agreement,  Sellers are entitled to retain the  Downpayment,  Sellers  shall be
entitled to the Downpayment and any Additional Cash Downpayments actually being
held by Escrow Agent  pursuant to this  Agreement,  together  with all interest
earned thereon (including,  without limitation,  any Downpayment Interest), and
to any  Downpayment  Letter of Credit  and  Additional  Downpayment  Letters of
Credit  actually  delivered  to  Escrow  Agent and  shall be  entitled  to draw
thereupon.

     4.   Closing

          4.1  The  closing  of  the  transaction   contemplated   hereby  (the
"Closing")  shall  occur at 10:00 AM on  December  1,  1998,  TIME BEING OF THE
ESSENCE as to Sellers' and Purchaser's  respective  obligation to close on such
date,  except as  otherwise  expressly  provided in Sections  4.2 and 4.3 below
(such date or, as the same may be adjourned by Sellers  pursuant to Section 4.2
below or Purchaser  pursuant to Section 4.3 below,  being referred to herein as
the "Closing Date").

          4.2 Sellers shall be entitled to one (1) or more  adjournments of the
Closing  Date to a date no later  than  10:00  AM on the  later to occur of (a)
January  30,  1999 or (b) that  date that is  thirty  (30) days  after the then
scheduled  Closing  Date,  pursuant  to the  provisions  of Section  6.3 and/or
Section 13.2 hereof,  by  delivering  to Purchaser  written  notice of any such
adjournment at least two (2) business days prior to the then scheduled  Closing
Date.

          4.3   Purchaser   shall  be  entitled  to  a  maximum  of  three  (3)
adjournments,  each such adjournment not to exceed thirty (30) days, TIME BEING
OF THE  ESSENCE as to each such  thirty  (30) day  period,  provided  that with
respect to each such  adjournment  requested by Purchaser,  Purchaser shall (a)
deliver  to Sellers  written  notice of any such  adjournment  at least two (2)
business days prior to the then scheduled Closing Date, and (b) Purchaser shall
simultaneously (i) deliver to Escrow Agent an additional  $1,000,000.00 by Wire
Transferred  Funds pursuant to the Wire Instructions set forth on Exhibit B for
each such  adjournment as an additional  downpayment  hereunder  (such payments
being referred to,  individually,  as an  "Additional  Cash  Downpayment"  and,
collectively, as the "Additional Cash Downpayments"), or (ii) deliver to Escrow
Agent a clean, irrevocable,  non-documentary and unconditional letter of credit
naming  Sellers as  beneficiary  in the amount of  $1,000,000.00  issued by and
drawn upon the Issuing  Bank in the form  attached  hereto as Exhibit  B-1, the
term of which  letter of credit  shall not expire prior to March 15, 1999 (each
such Letter of Credit  being  referred  to,  individually,  as the  "Additional
Downpayment Letter of Credit" and, collectively, as the "Additional Downpayment
Letters of  Credit").  All  Additional  Cash  Downpayments,  together  with any
interest  earned  thereon,  shall be deemed to be part of the  Downpayment  and
Purchaser  shall be entitled  to a credit  against  the  Purchase  Price at the
Closing in respect of each Additional Cash Downpayment; provided, however, that
any interest  earned on any of the Additional  Cash  Downpayments  shall not be
credited to the Purchase Price upon Closing (as hereinafter defined) and shall,
upon  Closing,  be and remain the  property  of  Sellers.  At the  Closing,  if
Purchaser has provided Escrow Agent with any Additional  Downpayment Letters of
Credit, Escrow Agent shall  contemporaneously  deliver such Downpayment Letters
of Credit to Purchaser.

          4.4 The Closing  shall  occur at the offices of Solomon and  Weinberg
LLP,  70 East 55th  Street,  New York,  New York  10022,  or at the  offices of
Purchaser's lender located in New York County, New York.

          4.5  Sellers  shall  cause an  interim  closing  of the  books of the
Company effective as of the Closing, for the purpose of allocating,  for income
tax purposes,  the income, loss, gain, deduction and credit attributable to the
Membership  Interests between Sellers and Purchaser based on the actual results
of the Company's activities during the period in which each was a holder of the
Membership  Interests.  Sellers shall  indemnify  Purchaser and hold  Purchaser
harmless from and against any federal,  state or municipal income tax liability
of Sellers in respect of the  Membership  Interests for any period prior to the
Closing Date.  Purchaser shall indemnify Sellers and hold Sellers harmless from
and against any federal,  state or municipal  income tax liability of Purchaser
in respect of the Membership  Interests for any period on and after the Closing
Date. The provisions of this Section 4.5 shall survive the Closing.

    5.    Representations and Warranties of Sellers and Purchaser.

          5.1  Each  Seller  represents,  warrants  and  covenants  to and with
Purchaser that the following are true and correct on the date hereof:

               5.1.1 Seller is a limited liability company duly formed, validly
existing and in good  standing  under the laws of the State of Delaware and has
the  requisite  power and  authority  to enter into and to perform the terms of
this  Agreement.  Seller is duly qualified to do business as a foreign  limited
liability  company and is in good standing in every  jurisdiction  in which the
nature  of  the  business   conducted  by  such  Seller   therein   makes  such
qualification necessary.

               5.1.2 The Company is a limited  liability  company  duly formed,
validly  existing and in good standing  under the laws of the State of Delaware
and is duly qualified to do business as a foreign limited liability company and
is in good standing in the State of New York.

               5.1.3 Associates LLC is a limited liability company duly formed,
validly  existing and in good standing  under the laws of the State of Delaware
and is duly qualified to do business as a foreign limited liability company and
is in good standing in the State of New York.

               5.1.4 The  execution  and  delivery  of this  Agreement  and the
consummation of the transactions  contemplated hereby have been duly authorized
by all requisite action of Seller. The execution and delivery of this Agreement
and the performance by Seller  hereunder will not (a) conflict with,  breach or
result in a default  under,  Seller's  certificate  of  formation  or operating
agreement,  (b) violate or constitute a default  under any material  agreement,
document or  instrument to which Seller is a party or to which Seller is bound,
except the Greenwich Loan  Documents (as  hereinafter  defined),  or (c) to the
best of Seller's  actual  knowledge,  violate or conflict with the terms of any
law, judgment,  order, writ, decree,  statute,  injunction,  rule or regulation
applicable to Seller or by which Seller is bound.  Seller has duly executed and
delivered this Agreement and this Agreement  constitutes  the valid and binding
obligation of Seller  enforceable  against Seller in accordance with its terms,
except  as  enforcement  thereof  may be  limited  by  bankruptcy,  insolvency,
moratorium,  reorganization  or other similar laws affecting  creditors' rights
generally, and by general principles of equity.

               5.1.5 Seller owns its  Membership  Interest and is conveying its
Membership  Interest  to  Purchaser  free  and  clear  of  all  liens,  claims,
encumbrances,  mortgages, pledges, hypothecations and charges of every kind and
nature, except for any lien, encumbrance,  mortgage or pledge created by any of
the Greenwich Loan  Documents.  Associates LLC owns its membership  interest in
Nominee  LLC free and  clear of all  liens,  claims,  encumbrances,  mortgages,
pledges,  hypothecations  and charges of every kind and nature,  except for any
lien,  encumbrance,  mortgage or pledge  created by any of the  Greenwich  Loan
Documents.

               5.1.6 The Company has no material  liabilities  other than those
reflected  on the balance  sheet of the Company  dated as of August 31, 1998, a
copy of which is  attached  hereto as  Schedule 1 and made a part  hereof  (the
"Company's  Balance  Sheet"),  except  for those  liabilities  incurred  in the
ordinary  course of  business of the  Company  since such date.  Seller has not
taken any action  which could  result in the  Company  incurring  any  material
liability,  except as  reflected  on such  balance  sheet and  except for those
liabilities  incurred in the ordinary  course of business of the Company  since
such date.

               5.1.7 Intentionally omitted.

               5.1.8  Seller is not a "foreign  person"  within the  meaning of
Section 1445 of the Internal Revenue Code 1986, as amended,  or any regulations
promulgated thereunder (collectively, the "Code").

               5.1.9 Attached hereto as Exhibit B-2 and made a part hereof is a
true and complete copy of that certain Promissory Note (the "Ford Note"), dated
May 31, 1996,  made by  Manhattan  Ford,  Lincoln-Mercury,  Inc. and Ford Motor
Company,  as makers, in favor of Kaufman Newmark Realty  Corporation,  as agent
for 555 West 57th Associates,  as assigned to the  Tenancy-in-Common by allonge
dated October 31, 1997. To the best of Seller's  actual  knowledge,  there have
been no defaults  under the Ford Note and there exist no offsets or defenses to
the obligations of the makers of the Ford Note thereunder.

          5.2  With respect to the Property, each Seller represents and warrants
to Purchaser as follows:

               5.2.1 The Company owns (a) a 64%  tenancy-in-common  interest in
the Property, and (b) 100% of the membership interests in Associates LLC.

               5.2.2 (a) Nominee LLC owns a 26%  tenancy-in-common  interest in
the Property.

                    (b) Associates LLC, the Company's wholly-owned  subsidiary,
owns a 2.875%  membership  interest  in Nominee  LLC;  57th  Associates  owns a
97.125%  interest  in  Nominee  LLC,  and  Associates  LLC  owns  a 1%  general
partnership  interest  in 57th  Associates.  A true  and  complete  copy of the
operating  agreement of Nominee LLC, together with all amendments  thereto,  if
any,  is  attached  hereto  as  Exhibit  C and made a part  hereof;  a true and
complete copy of the operating  agreement of Associates LLC,  together with all
amendments  thereto,  if any, is  attached  hereto as Exhibit D and made a part
hereof.

               5.2.3 The Company is a party to that  certain  Tenancy-In-Common
Agreement,  dated as of October  31,  1997 (the "TIC  Agreement"),  between the
Company,  Nominee LLC and CTKG West 57th LLC  ("CTKG"  and,  together  with the
Company and Nominee LLC, being sometimes hereinafter referred to, individually,
as  a   "Co-Tenant"   or   "Tenant-in-Common",   and,   collectively,   as  the
"Tenancy-in-Common",  "Tenants-in-Common" or "Co-Tenants"), a true and complete
copy of which agreement is attached hereto as Exhibit E and made a part hereof.
The Company has made no demands for any capital calls,  contributions  or other
payments  under the TIC  Agreement  that are  currently  due and payable by any
Co-Tenant  and  there  are  no  outstanding  demands  for  any  capital  calls,
contributions  or other  payments  under the TIC Agreement  with respect to any
Co-Tenant.  To the best of Seller's  actual  knowledge,  neither  the  Company,
Nominee LLC or CTKG is in default under the TIC Agreement.

               5.2.4  The  Property  is  managed  by  Kaufman   Newmark  Realty
Corporation  ("Newmark")  pursuant  to that  certain  Property  Management  and
Leasing Agreement, dated as of October 21, 1997, between Newmark, as agent, and
the Company, Nominee LLC and CTKG, as owners, a true and complete copy of which
agreement is attached hereto as Exhibit F and made a part hereof.

               5.2.5  There  are  no  leases  or  other  occupancy   agreements
affecting the Property other than those set forth on Exhibit G attached  hereto
and made a part hereof (such leases or occupancy agreements,  together with all
renewals,  replacements  and  amendments  thereof  entered  into after the date
hereof being herein referred to, collectively,  as the "Space Leases") and such
Space Leases contain the entire agreement between the Tenancy-in-Common and the
respective  Space Lessees (as  hereafter  defined) with respect to the premises
demised  to such  Space  Lessees  at the  Property.  Seller  has  delivered  to
Purchaser true,  correct and complete copies of all of the Space Leases,  which
have been initialed by Purchaser and Seller for identification.

               5.2.6  As to the Space Leases:

                     (a) Each  Space  Lease is in full force and effect and has
not been modified in any material  respect  except as set forth on Exhibit G or
in the schedule  attached hereto as Exhibit H and made a part hereof (the "Rent
Roll") and fixed rent and  additional  rent are  currently  being billed to the
tenants thereunder (the "Space Lessees") in accordance with the Rent Roll.

                     (b)  To  the  best  of  Seller's  actual  knowledge,   the
Tenancy-in-Common  is  not  in  default  in  any  of  its  respective  material
obligations  under any Space  Lease and no Space  Lessee  has made any  written
claim to the Company  asserting any right of offset or setoff  against the rent
due by such Space Lessee under any Space Lease.  To the best of Seller's actual
knowledge,  except as set forth in the Rent Roll, no Space Lessee is in default
of any of its material obligations under its Space Lease.

                     (c) Except as  otherwise  set forth on the Rent Roll,  (i)
all Space Lessees have been  delivered  possession  of the premises  demised to
them under their respective  Space Leases,  (ii) no Space Lessee is entitled to
any free rent, rent concessions or rent abatements under their respective Space
Leases, (iii) the rents and additional rents payable by the Space Lessees under
their  respective  Space Leases are being paid on a current basis,  except that
the Rent Roll sets forth all arrears in the payment of fixed rent or additional
rent under the Space  Leases as of  September  30, 1998 and (iv) to the best of
Seller's actual knowledge,  the Co-Tenants have not during the Company's period
of ownership  of the  Company's  Property  Interest  (as  hereinafter  defined)
overcharged  any Space  Lessee in the  payment of rent,  except  for  customary
adjustments  of  additional  rent  paid  on an  estimated  basis  and  adjusted
annually.

                     (d) Except as  otherwise  set forth on the Rent  Roll,  no
Space  Lessee has prepaid any rents or  additional  rents for more than one (1)
month in advance.

                     (e) Except as set forth on the Rent  Roll,  to the best of
Seller's actual knowledge,  the  Tenancy-in-Common  is not in possession of any
security deposits provided for in any of the Space Leases.

                     (f) Except as set forth on  Exhibit I attached  hereto and
made a part hereof,  or on the Rent Roll or in the Space  Leases,  all landlord
contributions  or  tenant  improvement  allowances  have been paid to the Space
Lessees  under  the  Space  Leases  and the  reasonably  estimated  cost of any
landlord  work to be completed  and  performed by the landlord  under the Space
Leases  (except for any such work required to be performed upon the exercise by
any Space Lessee of any renewal option or expansion  option as set forth in the
Space  Lease) is set forth on Exhibit I (such  landlord  contributions,  tenant
improvement  allowances and landlord work being referred to,  collectively,  as
the "Tenant Improvement Allowances").

                     (g) Except as set forth on  Exhibit J attached  hereto and
made a part  hereof,  there are no  leasing  brokerage  commissions  (or unpaid
installments  thereof)  due  and  payable  with  respect  to any  Space  Leases
(including  renewals,  extensions or expansions in connection  therewith  which
have been exercised) (the "Payable Commissions"),  and such Payable Commissions
shall,  to the extent not paid on or prior to the  Closing,  continue  to be an
obligation of the Company and the other Co-Tenants.

                     (h) On the Closing Date, neither the Company's interest in
the Space Leases,  nor the indirect interest in the Spaces Leases of Associates
LLC, shall be subject to any assignment, pledge, mortgage,  hypothecation, lien
or other encumbrance,  except for the rights of Greenwich Capital (as hereafter
defined) under the Greenwich Loan Documents (as hereafter defined).

                     (i) To the best of Seller's actual knowledge,  no existing
Space  Lessee has any option to renew its Space Lease that is not  provided for
in the existing Space Lease.  Sellers will cause the Company,  on behalf of the
Co-Tenants,  to serve  notice on Revlon  pursuant  to its Space  Lease so as to
cause  Revlon to  exercise,  waive or lose its option with respect to the offer
from the New York City Housing  Authority to lease certain 11th floor space and
Sellers will cause the Company to deliver to Purchaser a copy of such notice to
Revlon and any responses thereto.

               5.2.7  With respect to the Company's tenancy-in-common  interest
in the  Property  (the  "Company's  Property  Interest"),  and to the  best  of
Seller's  actual  knowledge  as to the  interests  in the Property of the other
Co-Tenants,  except as set forth on Exhibit J-1 attached hereto and made a part
hereof,  there  are  no  material  actions,  suits  or  proceedings  (including
landlord/tenant  proceedings)  pending or  threatened  in writing  against  the
Property,  at law  or in  equity,  before  any  federal,  state,  municipal  or
governmental department,  commission,  board, bureau, agency or instrumentality
which could (a)  materially  adversely  affect  title to the  Property,  (b) if
adversely  determined,  prohibit  Seller  from  consummating  the  transactions
contemplated  hereby or (c) materially  adversely  affect the continued use and
enjoyment of the Property as an office  building.  Seller shall give  Purchaser
prompt notice of any such action,  suit or  proceeding  which is filed prior to
the date of Closing of which Seller receives written notice.

               5.2.8  With respect to the Company's Property  Interest,  and to
the best of Seller's  actual  knowledge as to the  interests in the Property of
the  other   Co-Tenants,   there  are  no  pending  or  threatened  in  writing
condemnation or eminent domain proceedings that would affect the Property.

               5.2.9  To the best of Seller's  actual  knowledge,  there are no
persons employed by the Company in connection with the management, operation or
maintenance  of the Property  except as set forth on Exhibit K attached  hereto
and made a part hereof (the "Employees").

               5.2.10  Neither Seller nor the Company are a party to any option
to purchase,  right of first offer or right of first  refusal to acquire all or
any portion of the Company's Property Interest held by any other person, except
the BMW Purchase Option (as  hereinafter  defined) and, to the best of Seller's
actual knowledge,  neither of the other Co-Tenants are a party to any option to
purchase,  right of first offer or right of first refusal to acquire all or any
portion of the  Property  held by any other  person,  except  the BMW  Purchase
Option.

               5.2.11 (a)  Neither  the  Company,  nor to the best of  Seller's
actual knowledge,  the other Co-Tenants,  have used the Property or, except for
certain  uses by BMW of  Manhattan,  Inc.  ("BMW") in  respect of the  premises
demised to BMW at the Property under its Space Lease, permitted the Property to
be used, during the period of the Company's  tenancy-in-common ownership of the
Company, for the generation,  storage, release,  discharge or disposal of toxic
or Hazardous  Materials (as  hereinafter  defined),  other than such relatively
small  quantities of such materials as are ordinarily  used in connection  with
the development, use and operation of office buildings and which have been used
in compliance with applicable Environmental Laws (as defined below).

                     (b) To the best of Seller's  actual  knowledge,  except as
may be otherwise set forth in the that certain (i) Indemnity  Agreement,  dated
August 1, 1997, given by Mobil Oil Corporation, as indemnitor, in favor of 57th
Associates,  Newmark and BMW, as indemnitees  (the "Mobil  Indemnity") and (ii)
Indemnity   Agreement,   dated  August  __,  1997,  given  by  Manhattan  Ford,
Lincoln-Mercury,  Inc. and the Ford Motor Company, as indemnitors,  in favor of
57th  Associates,  its  partners,  lenders,  successors  and  assigns,  BMW and
Newmark, as indemnitees (the "Ford Indemnity"), no current Space Lessees (other
than BMW) or other  occupants  of the  Property  have used any  portion  of the
Property  for any  activities  involving,  directly  or  indirectly,  the  use,
generation,  treatment,  transportation,  storage or disposal of any  Hazardous
Materials in violation of all applicable  Environmental  Laws and, with respect
to BMW,  Seller  has not  received  any  actual  notice  of any  violations  of
applicable  Environmental  Laws. A true and complete  copy of each of the Mobil
Indemnity and the Ford Indemnity is attached hereto as Exhibit L and Exhibit M,
respectively.

                     (c) As used herein, the term "Hazardous  Materials:  means
(i) urea  formaldehyde  foam insulation,  (ii)  transformers or other equipment
which contain dielectric fluid containing levels of  polychlorinated  biphenyls
in excess of the  applicable  legal limit,  or (iii) any flammable  explosives,
radioactive  materials,   hazardous  materials,  hazardous  wastes,  hazardous,
controlled or toxic  substances,  or any pollutant or  contaminant,  or related
materials defined in or controlled pursuant to the Comprehensive  Environmental
Response,  Compensation  and  Liability  Act of 1980,  as  amended  (42  U.S.C.
Sections 9601 et seq.), the Hazardous Materials  Transportation Act, as amended
(49 U.S.C.  Sections 1801 et seq.), the Resource Conservation and Recovery Act,
as  amended  (42  U.S.C.  Sections  6901  et  seq.),  and  in  the  regulations
promulgated   pursuant   thereto,   or  any  other  federal,   state  or  local
environmental law, ordinance, rule or regulation (collectively,  "Environmental
Laws").  Expressly excluded from the definition of Hazardous  Materials in this
Agreement are asbestos and asbestos containing materials and expressly excluded
from the  definition of  Environmental  Laws in this  Agreement are any and all
laws,   ordinances,   rules  or  regulations  governing  asbestos  or  asbestos
containing materials. Seller makes no representations,  warranties or covenants
in this  agreement and hereby  expressly  disclaims any and all liability  with
respect to asbestos and asbestos containing materials.

                     (d) Except as  previously  disclosed  to  Purchaser in the
Ford  Indemnity  and the Mobil  Indemnity,  the  Company has not  received  any
written  notice from any  governmental  authority  in respect of  Environmental
Laws.

               5.2.12 Except as set forth on Exhibit N attached hereto and made
a part hereof, the Company has neither commenced nor maintained any proceedings
to decrease the assessed valuation of the Property.

               5.2.13  To the best of  Seller's  actual  knowledge,  Exhibit  O
attached  hereto  and made a part  hereof  sets  forth  all  material  service,
maintenance  and  supply  contracts  (collectively,  the  "Service  Contracts")
relating  to the  Property  and all  deposits  held by utility  companies  with
respect to the Property.

               5.2.14 To the best of Seller's actual knowledge,  there has been
no requirement or recommendation as to material repairs or other work made with
respect to the  Property by any  insurance  company that has issued a policy of
insurance to the Company or to the  Tenants-in-Common  in  connection  with the
Property or by any board of fire underwriters or other body exercising  similar
functions  that  has  not  been  complied  with  by the  Company  or the  other
Co-Tenants.

               5.2.15 To the best of  Seller's  actual  knowledge,  no material
facts or conditions  exist which would result in the  termination or impairment
of access to the Property or the  discontinuation  of necessary  sewer,  water,
electric, gas, telephone or other utility services to the Property.

               5.2.16  To the best of  Seller's  actual  knowledge,  Exhibit  P
attached  hereto and made a part  hereof  sets forth the  reasonably  estimated
costs, as of the date hereof, to substantially complete that portion of the 5th
and 6th Floor  Office  Conversion  (as defined on Exhibit P) not  substantially
completed as of the date hereof.

               5.2.17 To the best of  Seller's  actual  knowledge,  there is no
Right (as hereinafter  defined) not of record that materially adversely affects
the continued use and enjoyment of the Property as currently operated.

               5.2.18  Except as set forth in  Exhibit O, the  Company  has not
authorized the  Tenancy-in-Common  to enter into, and the  Tenancy-in-Common is
not a party to, any agreement with Partners  Cleaning,  LLC ("PC")  pursuant to
which PC provides  services in respect of the Property.  The agreement  with PC
set forth on Exhibit O is  terminable  on not more than sixty (60) days advance
written notice without penalty.

               5.2.19  Reference  is  made to that  certain  Railroad  Easement
Agreement,  dated June 8, 1932,  between  New York  State  Realty and  Terminal
Company,  as grantor,  and The New York Central Railroad  Company,  as grantee,
recorded in the Office of the New York City Register on June 10, 1932, in Liber
3842, cp 11 (together with all  modifications,  releases,  easements,  deeds of
easement  and deeds with  respect  thereto as are of record on the date hereof,
the "Railroad Easement"). To the best of Seller's actual knowledge,  during the
period of the Company's  ownership of the Company's Property Interest,  neither
the grantee under the Railroad Easement nor any  successor-in-interest  to such
grantee  has made any  demand  upon any  Co-Tenant,  or given any notice to any
Co-Tenant,  seeking  to  assert  any right  conferred  upon  such  grantee  (or
successor)  under such Railroad  Easement that would mutually  adversely affect
all or any portion of the Property.

               5.2.20  To the  best of  Seller's  actual  knowledge,  the  only
brokerage  commission  that would be due and payable by the  Co-Tenants  in the
event the BMW  Purchase  Option (as  hereinafter  defined) is  exercised is set
forth in that certain Co-Brokerage  Agreement,  dated October 29, 1996, between
Kaufman/Newmark Realty Corp., as agent for 555 W. 57th Associates,  and Cushman
& Wakefield, Inc., as broker, a copy of which is attached hereto as Exhibit P-1
and made a part hereof.

          5.3 Purchaser  represents,  warrants and covenants to and with Seller
that the following are true and correct on the date hereof:

               5.3.1 Purchaser is a limited  partnership  duly formed,  validly
existing and in good  standing  under the laws of the State of Delaware and has
the  requisite  power and  authority  to enter into and to perform the terms of
this Agreement. Purchaser is duly qualified to do business as a foreign limited
partnership  and is in good standing in every  jurisdiction in which the nature
of the  business  conducted  by  Purchaser  therein  makes  such  qualification
necessary.

               5.3.2 The  execution  and  delivery  of this  Agreement  and the
consummation of the transactions  contemplated hereby have been duly authorized
by all  requisite  action of  Purchaser.  The  execution  and  delivery of this
Agreement and the performance by Sellers  hereunder will not (a) conflict with,
breach  or  result  in  a  default  under,   Seller's  certificate  of  limited
partnership  or agreement of limited  partnership,  (b) violate or constitute a
default under any material agreement, document or instrument to which Purchaser
is a party or to which  Purchaser is bound,  or (c) to the best of  Purchaser's
actual  knowledge,  violate or  conflict  with the terms of any law,  judgment,
order,  writ, decree,  statute,  injunction,  rule or regulation  applicable to
Purchaser  or by which  Purchaser  is bound.  Purchaser  has duly  executed and
delivered this Agreement and this Agreement  constitutes  the valid and binding
obligation of Purchaser  enforceable  against  Purchaser in accordance with its
terms, except as enforcement thereof may be limited by bankruptcy,  insolvency,
moratorium,  reorganization  or other similar laws affecting  creditors' rights
generally, and by general principles of equity.

               5.3.3 The  representations and warranties of Purchaser contained
in this Section 5.3 shall survive the Closing.

          5.4 Purchaser  acknowledges  and agrees that,  except as specifically
set forth in this Agreement, neither Sellers nor any agent or representative or
purported  agent or  representative  of Sellers  has made,  and Sellers are not
liable  for or bound in any manner  by,  any  express  or  implied  warranties,
guaranties, promises, statements,  inducements,  representations or information
pertaining to the Company, or the Property or any portion thereof, the physical
condition,  size, zoning, income, expenses or operation thereof, the uses which
can be made of the same or any other  matter  or thing  with  respect  thereto,
including, without limitation, any existing or prospective leasing or occupancy
of  all  or  any  part  thereof.  Without  limiting  the  foregoing,  Purchaser
acknowledges  and  agrees  that  Sellers  are not  liable  for or bound by (and
Purchaser   has  not   relied   upon)  any   verbal  or   written   statements,
representations  or any other information  respecting the Property furnished by
Seller or any broker, employee,  agent, consultant or other person representing
or purportedly  representing  Sellers. The provisions of this Section 5.4 shall
survive the Closing.

          5.5 Subject to Purchaser's  compliance with the  requirements of this
Section 5.5, Sellers'  representations and warranties contained in Sections 5.1
and 5.2 shall  survive  the  Closing as follows:  (a) the  representations  and
warranties  contained in Sections  5.1.1 through and including  5.1.8,  Section
5.2.1(b),  Section  5.2.6(e)  and 5.2.17  shall  survive the  Closing;  (b) the
representations  and warranties  contained in Sections 5.2.2(b),  5.2.5, 5.2.10
and 5.2.6(g)  shall  survive the Closing for a period of one (1) year;  (c) the
representations and warranties contained in Sections 5.2.3, 5.2.6(a), (b), (c),
(f), (h), (i), 5.2.7, 5.2.8,  5.2.12,  5.2.14,  5.2.15 and 5.2.20 shall survive
the  Closing  for  a  period  of  one  hundred   eighty  (180)  days;  (d)  the
representations and warranties  contained in Sections 5.1.9,  5.2.4,  5.2.6(d),
5.2.9, 5.2.11,  5.2.13, 5.2.16, 5.2.18 and 5.2.19 shall survive the Closing for
a period  of ninety  (90)  days;  and (e) the  representations  and  warranties
contained in Sections 5.2.1(a) and 5.2.2(a) shall not survive the Closing (such
survival  periods  referred to in clauses  (a)  through  (d) being  referred to
herein,  collectively,  as the "Survival Period"). Any claim by Purchaser after
the  Closing  that  either  or  both  Sellers  have   breached  the   aforesaid
representations  and  warranties  shall  be made by  Purchaser  promptly  after
Purchaser  has  learned  of  such  breach  and,  in all  events,  prior  to the
expiration of the applicable Survival Period by Purchaser delivering to Sellers
written notice (a "Claim Notice") setting forth (i) a description in reasonable
detail of the claimed breach or breaches,  as applicable,  (ii) the Section and
subsection  of this  Agreement  under which such claimed  breach or breaches is
asserted,  (iii) Purchaser's  good-faith calculation of the damages suffered by
Purchaser by reason of such claimed breach or breaches,  and (iv) all documents
and written  material  upon which  Purchaser  asserts  such  claimed  breach or
breaches.  TIME SHALL BE OF THE ESSENCE in respect of Purchaser's obligation to
deliver to  Sellers a Claim  Notice in the manner  herein  provided  within the
Survival Period.  Sellers shall have no liability for any claimed breach of the
aforesaid  representations  and  warranties  until there shall be found to have
existed  pursuant to an order of a court of competent  jurisdiction one or more
breaches by Sellers of such representations or warranties.  Notwithstanding the
foregoing,  with  respect to the  representations  and  warranties  as to Space
Leases set forth in  Section  5.2  hereof,  to the  extent  Sellers  deliver to
Purchaser an Estoppel (as  hereafter  defined) with respect to any Space Lease,
the  representations and warranties as to the matters expressly covered in such
Estoppel shall be deemed deleted and shall not survive the Closing.

     6.   Title Matters Affecting the Property; Exceptions to Title.

          6.1 Sellers and Purchaser  hereby agree that on the Closing Date, the
Property shall not be subject to any liens,  encumbrances,  or other matters of
record except the following matters (the "Permitted Exceptions"):

               6.1.1 All  presently  existing  and future liens for unpaid real
estate taxes and water and sewer  charges not due and payable as of the date of
Closing, subject to adjustment as hereinafter provided.

               6.1.2 All present and future zoning, building, environmental and
other laws, ordinances, codes, restrictions and regulations of all governmental
authorities  having  jurisdiction  with  respect to each the  Property  and all
zoning  variances  and  special  exceptions,  if any  (collectively,  "Laws and
Regulations").

               6.1.3 All covenants,  restrictions  and rights and all easements
and  agreements  for the erection  and/or  maintenance  of water,  gas,  steam,
electric,  telephone, sewer or other utility pipelines,  poles, wires, conduits
or other like facilities, and appurtenances thereto, over, across and under the
Property (collectively,  "Rights"), provided that such Rights are (a) of record
on the date  hereof or (b) not of record  and do not (i)  materially  adversely
affect the continued use and enjoyment of the Property as currently used.

               6.1.4  Any  state  of  facts  which  would  be shown on or by an
accurate current survey of the Property (collectively,  "Facts"), provided that
such Facts do not materially  adversely  affect the continued use and enjoyment
of the Property as currently used.

               6.1.5 Rights of Space Lessees under the Space Leases.

               6.1.6  All  Service  Contracts  set  forth on  Exhibit O and all
renewals, replacements, extensions of same or additional service contracts that
may hereafter be entered into in accordance with the terms of this Agreement.

               6.1.7 Consents by Sellers or any other owners or former owner of
the Property for the erection of any structure or structures on, under or above
any street or streets on which the Property may abut, provided that the same do
not materially adversely affect the continued use and enjoyment of the Property
as currently used.

               6.1.8 The  matters  set forth in Exhibit Q  attached  hereto and
made a part hereof.

               6.2  Purchaser  agrees,  promptly  upon  the  execution  of this
Agreement,  at its sole cost and expense,  to cause title to the Property to be
examined by Title Associates, Inc. through Chicago Title Insurance Company (the
"Title  Company") and shall direct the Title Company to deliver  copies of such
title report (the "Title Report") to Sellers'  attorney  promptly upon receipt.
Purchaser  further  agrees  that not later  than five (5)  business  days after
Purchaser  receives  the Title  Report,  Purchaser  will  furnish  to  Sellers'
attorneys a specification in writing (the "Title Report  Objection  Notice") of
any  exceptions  to title to the  Property  set forth in the Title Report which
Purchaser  believes  are not  covered by the  exceptions  to title set forth in
Section  6.1  hereof.  If,  after  giving the Title  Report  Objection  Notice,
Purchaser  learns,  through  continuation  reports to the Title Report or other
written evidence, of any title defect(s) which Purchaser claims are not covered
by Section 6.1 above,  Purchaser shall give notice thereof to Sellers  promptly
after the date  Purchaser  learns  of same.  Any title  insurance  obtained  by
Purchaser  in  connection  with the Closing  hereunder in  connection  with the
Property  shall  be  obtained  from the  Title  Company  and one or more  title
companies selected by Purchaser to co-insure (up to 45%) the Company's Property
Interest.

               6.3 If, on the Closing Date, the Company's  Property Interest is
subject to any material matters other than the Permitted Exceptions (other than
the matters  that  Sellers  shall cause to be satisfied or cured at or prior to
the  Closing as  hereinafter  provided  in this  Section),  Purchaser  shall be
entitled  to a credit  against  the  Purchase  Price in an amount  equal to the
reasonable cost to cure any such title defects; provided,  however, that if the
cost to cure such material  matters is in excess of $500,000.00 (the "Threshold
Amount"),  Purchaser,  at its option and  subject to the right of Sellers to an
adjournment as hereinafter  provided,  may elect to either (a) proceed with the
Closing,  in which case  Purchaser  shall receive a credit against the Purchase
Price equal to the Threshold Amount, or (b) terminate this Agreement by written
notice  delivered on the scheduled  date of Closing or before such date (in the
case of  exceptions  that are not  Permitted  Exceptions  and which  exceptions
Sellers   theretofore   indicated  they  are  unable  or  unwilling  to  cure).
Notwithstanding the immediately  preceding sentence,  if the cost to cure title
defects is in excess of the Threshold  Amount,  Sellers shall have the right to
one (1) or more adjournments of the Closing as set forth in Section 4.2 hereof,
in order to  attempt  to cure all or some of such  title  matters  that are not
Permitted  Exceptions  such that the Threshold  Amount is no longer exceeded on
the Closing Date, as so  adjourned,  and so long as the aggregate  cost to cure
any title  objections  on the Closing Date as so adjourned  does not exceed the
Threshold Amount, Purchaser shall be obligated to close hereunder and receive a
credit  in  respect  of the  reasonably  estimated  cost  to  cure  such  title
objections;  if the aggregate cost to cure any title  objections on the Closing
Date as so adjourned  still  exceeds the  Threshold  Amount and Sellers are not
entitled to any further adjournments  hereunder or elect not to further adjourn
the Closing,  then  Purchaser,  at its option,  may either (i) proceed with the
Closing,  in which case  Purchaser  shall receive a credit against the Purchase
Price equal to the  Threshold  Amount,  or (ii)  terminate  this  Agreement  by
written notice  delivered on the scheduled or before the  re-scheduled  Closing
Date.  If  Purchaser  elects to terminate  this  Agreement as permitted in this
Section,  (x) the Escrow Agent shall repay to Purchaser the Downpayment made by
Purchaser,  together with any interest earned thereon and (y) Sellers shall pay
to  Purchaser  contemporaneously  with such  repayment of the  Downpayment  and
interest  the  reasonable  search  charges  imposed  by the  Title  Company  in
connection  with its  examination  of title to the Property (the "Title Cost").
This  Agreement  shall  thereupon be deemed  canceled and become void and of no
further  effect,  and neither party shall have any obligations of any nature to
the other hereunder or by reason hereof, except that the provisions of Sections
11.2.2,  17, 18, 24 and 28 hereof  shall  survive such  termination.  Except as
otherwise expressly set forth in this Agreement,  Sellers shall not be required
to take or bring any  action or  proceeding  or any other  steps to remove  any
defect in or  objection  to title or to fulfill any  condition or to expend any
moneys  therefor,  nor shall Purchaser have any right of action against Sellers
therefor, at law or in equity. Notwithstanding the foregoing, but in all events
subject  to  the  provisions  of 6.6  hereof,  to the  extent  that  any of the
following  items are not  Permitted  Exceptions,  Sellers  shall on or prior to
Closing pay,  discharge or remove of record or cause to be paid,  discharged or
removed of record all of the following items (collectively,  "Seller's Liens"):
(I) mortgages  encumbering  the  Company's  Property  Interest  (other than the
mortgages  securing the Greenwich Loan) and (II) any other lien encumbering the
Company's  Property Interest and/or either or both of the Membership  Interests
which  are in  liquidated  amounts  and which  may be  satisfied  solely by the
payment  of  money   (including  the   preparation  or  filing  of  appropriate
satisfaction instruments in connection therewith).

          6.4  Notwithstanding  anything in Section 6.3 above to the  contrary,
Purchaser may at any time, at Purchaser's  option,  accept such title as exists
on the Closing Date,  without  reduction of the Purchase Price or any credit or
allowance on account thereof or any claim against  Sellers,  but the provisions
of this Section 6.4 shall not be deemed to  constitute a waiver of  Purchaser's
rights to any credits Purchaser may otherwise be entitled to under this Article
6.

          6.5 Notwithstanding anything to the contrary contained in Section 6.1
hereof, to the extent that there are any unpaid real estate taxes,  assessments
and water and sewer charges due and payable on the date of Closing  encumbering
the  Company's  Property  Interest  (as well as any  outstanding  interest  and
penalties thereon),  Sellers may, at their option,  either (a) satisfy same out
of the  Company's  or  Sellers'  funds or from any  appropriate  bank  accounts
maintained by the  Tenants-in-Common  in respect of the Property  (individually
and collectively, the "Property Account"), (b) cause to be paid an amount equal
to 65% of all such outstanding amounts to the appropriate taxing authority,  or
(c) allow  Purchaser  a credit in  respect of the  Purchase  Price in an amount
equal to 65% of all such  outstanding  amounts,  provided that  official  bills
therefor with interest and penalties thereon figured to said date are furnished
to or obtained by the Title  Company at the  Closing  for payment  thereof,  in
which  case  Sellers  shall  be  deemed  to have  fulfilled  their  obligations
hereunder  with respect to real estate taxes,  assessments  and water and sewer
charges in respect of the Property;  provided,  however,  that if Sellers elect
the option set forth in clause (b) or (c) of this Section 6.5,  Purchaser shall
have the right to elect to terminate  this  Agreement  rather than proceed with
the Closing,  in which case Escrow Agent shall promptly  thereafter  return the
Downpayment  hereunder to Purchaser (or, if  applicable,  Sellers shall deliver
any  Downpayment  Letter of Credit  and/or  Additional  Downpayment  Letters of
Credit to Purchaser) and neither party shall have any further rights, duties or
obligations  hereunder,  and this  Agreement  shall be of no further  force and
effect,  except for the provisions of Sections 11.2.2, 17, 18. 24 and 28, which
provisions shall survive such termination.

          6.6  Notwithstanding  anything to the contrary  contained in Sections
6.1 or 6.3 hereof,  any liens for judgments or transfer,  inheritance,  estate,
franchise,  license or other similar taxes or any  encumbrances  or other title
exceptions which would be grounds for Purchaser to reject title hereunder shall
not be deemed an  objection  to title if any such liens  encumber  (a) only the
tenancy-in-common  interest  of CTKG or (b) the  tenancy-in-common  interest of
Nominee  LLC solely as a result of the acts or  omissions  of 57th  Associates.
Notwithstanding  anything to the contrary  contained in Section 6.1 hereof,  if
the Company's  Property  Interest shall, at the time of Closing,  be subject to
any liens for judgments or transfer, inheritance, estate, franchise, license or
other similar taxes or any  encumbrances or other title  exceptions which would
be grounds  for  Purchaser  to reject  title  hereunder,  the same shall not be
deemed an objection to title so long as (i) neither the Company nor the Sellers
have  knowingly  and  intentionally  suffered  or  allowed  to be placed on the
Company's  Property  Interest  any such lien,  (ii) the  Company  shall have no
personal  liability  for such lien and (iii) the Company  shall have a cause of
action  against a third  party for the  removal  of such  lien,  in which  case
Sellers shall have no obligation to pay, remove or cause to be removed any such
lien,  it being  understood  and  agreed  that if the  conditions  set forth in
clauses  (i),  (ii) and (iii)  shall  not be  satisfied,  Sellers  use all or a
portion of the  Purchase  Price to satisfy  the same and  deliver to  Purchaser
and/or the Title Company at the Closing  instruments  in  recordable  form (and
otherwise in form reasonably satisfactory to the Title Company in order to omit
the same as an  exception  to any title  policy  being issued at the Closing to
Purchaser or any mortgagee)  sufficient to satisfy and discharge of record such
liens and  encumbrances  together  with the cost of  recording  or filing  such
instruments at regular rates without additional premium.

     7.    As Is;  Access to Property  During  Contract  Period;  Operation of
Property.

          7.1 Purchaser hereby acknowledges, represents, warrants and agrees to
and with Seller as follows:

               7.1.1 Except as is expressly set forth in this  Agreement to the
contrary,  Seller  shall have no  obligation  hereunder to take any action with
respect to the Property and Purchaser is expressly  purchasing  the  Membership
Interests based upon the existing condition of the Property,  "AS IS, WHERE IS,
AND WITH ALL FAULTS" with respect to all facts,  circumstances,  conditions and
defects,  including,  without  limitation,  any  violations  and  penalties  of
building,  fire,  sanitary,   environmental,   housing  and  similar  laws  and
regulations  (the  "Violations")  and, except as is expressly set forth in this
Agreement to the  contrary,  Sellers have no obligation to determine or correct
any  such  facts,  circumstances,  conditions,  defects  or  Violations  or  to
compensate  Purchaser  for same.  Sellers have  specifically  bargained for the
assumption by Purchaser of all responsibility to investigate the Property, Laws
and Regulations,  Rights, Facts, Space Leases, Service Contracts and Violations
and of all risk of adverse conditions and has structured the Purchase Price and
other  terms  of  this  Agreement  in  consideration  thereof.   Purchaser  has
undertaken  all such  investigations  of the  Property,  Laws and  Regulations,
Rights,  Facts,  Space Leases,  Service  Contracts and  Violations as Purchaser
deems necessary or appropriate  under the circumstances as to the status of the
Property  and  based  upon  same,  except  as is  expressly  set  forth in this
Agreement to the contrary, Purchaser is and will be relying strictly and solely
upon such  inspections and  examinations  and the advice and counsel of its own
consultants,  agents,  legal  counsel and officers and Purchaser is and will be
fully  satisfied  that,  based upon the condition of the Property and the other
assets of the Company,  the Purchase  Price is fair and adequate  consideration
for the Membership  Interests and, by reason of all the foregoing  except as is
expressly set forth in this  Agreement to the contrary,  Purchaser  assumes the
full risk of any loss or damage occasioned by any fact, circumstance, condition
or defect pertaining to the Property.

               7.1.2 Except as is expressly set forth in this  Agreement to the
contrary,  Sellers  hereby  disclaim  all  warranties  of any  kind  or  nature
whatsoever  (including  warranties of  habitability  and fitness for particular
purposes),   whether  expressed  or  implied,  including,  without  limitation,
warranties with respect to the Membership Interests and the Property. Purchaser
further  acknowledges  that, except as is expressly set forth in this Agreement
to the contrary,  Purchaser is not relying upon any  representation of any kind
or nature made by Sellers,  or any of its  employees  or agents with respect to
the  Membership  Interests  and  the  Property,  and  that,  in  fact,  no such
representations were made except as expressly set forth in this Agreement.

          7.2 Purchaser and its authorized  representatives,  partners, agents,
employees,   licensees,   contractors  and  consultants,  upon  giving  Sellers
reasonable prior notice of Purchaser's  request,  shall, from time to time have
access  to (a) the  Property  for the  purpose  of  inspecting  and  conducting
engineering and architectural studies,  environmental inspections,  appraisals,
construction and renovation  estimating and marketing and feasibility  studies,
and (b) all rent rolls,  arrears reports and collection reports,  Space Leases,
Space  Lease  files,  Service  Contracts,  Service  Contract  files,  plans and
specifications,  permits,  notices from  governmental  authorities and Employee
records in respect of the  Property  and in  Sellers'  possession  or  control,
provided  that   Purchaser   shall  (i)  at  all  times  be  accompanied  by  a
representative of Sellers when at the Property and (b) not materially interfere
with the operation of the Property or  materially  disturb the occupancy of any
Space Lessee.  Purchaser  hereby  indemnifies and holds harmless  Sellers,  the
Company,  Nominee LLC and CTKG and their direct and  indirect  members from any
and all  claims,  damage,  liability,  loss,  cost and  expense  that arises in
connection with all claims arising out of the acts of Purchaser, its authorized
representatives,  partners, agents, employees, licensees, invitees, contractors
and  consultants  in  connection  with the  exercise by Purchaser of its rights
under this Section 7.2.

          7.3 Purchaser and its authorized  representatives,  partners, agents,
employees,   licensees,   contractors  and  consultants,  upon  giving  Sellers
reasonable prior notice of Purchaser's  request,  shall, from time to time have
access to all of the  financial  books and records with respect to the Property
over which the Company or Sellers  exercise  possession  and control,  provided
that Sellers expressly make no representation or warranty as to the accuracy of
such financial books and records and Sellers shall not be liable for any errors
or omissions  with  respect to such  financial  books and records,  except that
notwithstanding the foregoing,  Sellers represent and warrant that they have no
actual knowledge that such books and records contain any material inaccuracies.

          7.4  Until the  Closing  or  earlier  termination  of this  Agreement
Sellers  shall use  commercially  reasonable  efforts to cause the  Company and
Newmark to (a) operate and maintain the  Property in a manner  consistent  with
the manner in which the Property has been operated and maintained  prior to the
date  hereof and (b) not  remove nor  knowingly  permit  the  removal  from the
Property of any of the personal property that constitutes the Property and that
is owned by the Company  and/or the  Tenancy-in-Common,  except in the ordinary
course of  business  or unless  such item is  replaced  with a similar  item of
comparable  utility  and value.  In  furtherance  of the  foregoing,  until the
Closing  or  earlier   termination  of  this   Agreement,   Sellers  shall  use
commercially  reasonable  efforts to cause the Company to  exercise  its rights
under the TIC Agreement to cause the Property to be operated and  maintained in
a manner consistent with the manner in which the Property has been operated and
maintained  prior to the  date  hereof  and to  cause  the  Company  and  other
Co-Tenants to comply with the terms of the TIC  Agreement;  provided,  however,
that the failure of the other Co-Tenants to comply with the TIC Agreement shall
not be deemed a breach  hereunder  by Sellers  unless  such  failure  otherwise
constitutes a breach under this Agreement.

          7.5  Between  the  date  hereof  and  the  Closing  Date  or  earlier
termination of this  Agreement,  Sellers shall not permit the Company to extend
the  term of any  Service  Contract  or to enter  into  any new or  replacement
Service Contracts without the express prior written consent of Purchaser, which
consent  shall not be  unreasonably  withheld or delayed,  unless such  Service
Contract  shall (a) be  terminable  on sixty  (60) days or less  prior  written
notice  without  the  payment of any penalty or  termination  fee,  and (b) not
require any regularly  scheduled payments under such Service Contract in excess
of $25,000.00 per month. If Purchaser  fails to respond to Sellers'  request to
enter into any new or  replacement  Service  Contract under this Section within
five (5) business  days,  Purchaser  shall be deemed to have  consented to such
request of Sellers.

     8.   Apportionments, Adjustments and Credits.

          8.1 At the Closing,  (a) the  following  items shall be  apportioned,
adjusted  or credited  between the parties as of 11:59 PM on the day  preceding
the date of Closing and (b) Sellers shall certify in writing to Purchaser  that
the information in respect of the  apportionments  provided by Sellers which is
used as the basis for such  apportionments  is true and correct in all material
respects. Any errors in the apportionments  pursuant to this Article 8 shall be
corrected  by   appropriate   re-adjustment   between   Sellers  and  Purchaser
post-closing,   provided  that  notice  of  any  such  error,  with  supporting
calculations,  shall  be  given  by  Purchaser  to  Sellers  or by  Sellers  to
Purchaser,  as the case may be, no later  than one  hundred  eighty  (180) days
after the Closing, if ascertainable within such period, it being understood and
agreed that if any such items or errors are not  determinable  at Closing,  the
apportionment  shall be made  subsequent to Closing when the charge or error is
determined.   Except  as  otherwise   specifically  provided  for  herein,  all
apportionments  shall  be made in the  manner  recommended  by the  Customs  in
Respect to Title Closings of the Real Estate Board of New York, Inc., and there
shall be no other  apportionments or adjustments except as otherwise  expressly
provided herein. The items to be apportioned, adjusted and credited are:

               8.1.1  Sellers  shall receive a credit in an amount equal to 65%
of the amount by which (a) the aggregate cash balances in the Property  Account
on the date of Closing  exceed (b) the amount of rents paid by Space Lessees in
respect of the month of Closing or future  months  which  comprise a portion of
such aggregate cash balances in the Property Account;  provided,  however, that
Sellers hereby agree that Sellers shall use commercially  reasonable efforts to
cause the aggregate  cash balances in the Property  Account not to be in excess
of $3,000,000.00 on the Closing Date.

               8.1.2  Purchaser  shall receive any credit  against the Purchase
Price that  Purchaser may be entitled to under Article 6 hereof with respect to
title matters.

               8.1.3 Purchaser shall receive a credit in an amount equal to 65%
of all  Tenant  Improvement  Allowances  that have not been  paid  prior to the
Closing Date.

               8.1.4 With respect to the Greenwich Loan,  Sellers shall receive
the following  credits in respect of remaining  funds in the following  Reserve
Accounts (as such term is defined in Section 18 of the Greenwich Loan Agreement
(as defined in Section 11.1 hereof):

                     (a) A credit in an  amount  equal to 65% of the sum of (i)
the funds remaining in the Leasing Security Deposit (as such term is defined in
Section 18(a) of the Greenwich Loan Agreement) as of the Closing Date plus (ii)
all  interest  earned  thereon as of the  Closing  Date and not yet paid to the
Company or the other Co-Tenants, whether or not such interest has been credited
to such account as of the Closing Date;

                     (b) A credit in an  amount  equal to 65% of the sum of (i)
the funds remaining in the Fifth and Sixth Floor Conversion Reserve (as defined
in Section 18(b) of the Greenwich  Loan  Agreement) as of the Closing Date plus
(ii) all interest earned thereon as of the Closing Date and not yet paid to the
Company or the other Co-Tenants, whether or not such interest has been credited
to such account as of the Closing Date;

                     (c) A credit in an  amount  equal to 65% of the sum of (i)
the funds remaining in the Leasing Reserve Account (as defined in Section 18(d)
of the Greenwich Loan  Agreement) as of the Closing Date plus (ii) all interest
earned  thereon as of the  Closing  Date and not yet paid to the Company or the
other  Co-Tenants,  whether  or not such  interest  has been  credited  to such
account as of the Closing Date;

                     (d) A credit in an  amount  equal to 65% of the sum of (i)
the funds remaining in the  Replacement  Reserve Account (as defined in Section
18(e) of the  Greenwich  Loan  Agreement)  as of the Closing Date plus (ii) all
interest  earned thereon as of the Closing Date and not yet paid to the Company
or the other Co-Tenants, whether or not such interest has been credited to such
account as of the Closing Date; and

                     (e) A credit in an  amount  equal to 65% of the sum of (i)
any funds remaining in any capital  improvement  reserve account  maintained in
connection  with  the  Greenwich  Loan as of the  Closing  Date  plus  (ii) all
interest  earned thereon as of the Closing Date and not yet paid to the Company
or the other Co-Tenants, whether or not such interest has been credited to such
account as of the Closing Date.

               8.1.5 Purchaser shall receive a credit in an amount equal to 65%
of all Payable Commissions that have not been paid prior to the Closing Date.

               8.1.6 Purchaser shall receive a credit in an amount equal to 65%
of the reasonably  estimated  costs,  as of the Closing Date, to  substantially
complete  that  portion  of  the  5th  and  6th  Floor  Office  Conversion  not
substantially completed as of the Closing Date. Notwithstanding anything to the
contrary herein  contained,  at least ten (10) days and not earlier than twenty
(20) days prior to the Closing  Date,  Sellers  will furnish  Purchaser  with a
certification   from  the   Co-Tenants'   architect,   engineer  or  consulting
construction  manager (a)  estimating the cost to  substantially  complete that
portion of the 5th and 6th Floor Office Conversion not substantially  completed
as of the Closing Date and (b)  specifying  all amounts  expended in respect of
the 5th and 6th Floor Office  Conversion after the date hereof through the date
of such  certification  ("Sellers'  Estimate").  If  Purchaser  disagrees  with
Sellers' Estimate, Purchaser shall, within five (5) days of Purchaser's receipt
of Sellers'  Estimate,  furnish Sellers with a certification  from  Purchaser's
architect,  engineer or consulting  construction manager estimating the cost to
substantially  complete that portion of the 5th and 6th Floor Office Conversion
not substantially completed as of the Closing Date ("Purchaser's Estimate"). If
Purchaser  does  not  submit  a  Purchaser's   Estimate  as  provided   herein,
Purchaser's  credit  pursuant to this Section 8.1.6 shall be in an amount equal
to 65% of Sellers'  Estimate.  If Purchaser  submits a Purchaser's  Estimate as
provided  herein,  Purchaser's  credit  pursuant  to this  Section  8.1.6 shall
nevertheless be in an amount equal to 65% of Seller's Estimate,  except that if
Purchaser's  Estimate is more than 102% of Seller's  Estimate,  Purchaser shall
have the right to cause the  correct  amount  of such  credit to be  determined
pursuant to binding arbitration by a single arbitrator  appointed in accordance
with the American  Arbitration  Association  rules and  procedures  for binding
arbitration.  Such  arbitrator  shall be impartial and shall have not less than
ten (10) years'  experience  in the County of New York in a calling  related to
the  construction,  renovation and  improvement of class "A" office  buildings.
Within twenty (20) days following the appointment of such arbitrator each party
shall attend a hearing before such arbitrator wherein each party shall submit a
written  report  setting  forth  its  determination  of the  correct  amount of
Purchaser's  credit  pursuant to this Section 8.6.1 with such  information  and
evidence  contained  therein as the party  submitting  such  report  shall deem
relevant.  The arbitrator shall, within thirty (30) days following such hearing
and submission of such evidence and  information,  render a decision as to what
the reasonably  estimated cost to substantially  complete the 5th and 6th Floor
Office Conversion was as of the Closing Date (the "Arbitrator's  Estimate"). If
the  Arbitrator's  Estimate  is more than 102% of Sellers'  Estimate,  Sellers'
shall pay to Purchaser within ten (10) days of notification of the arbitrator's
decision 65% of the amount by which (y) the lesser of (1) Purchaser's  Estimate
and (2) the  Arbitrator's  Estimate exceeds (z) Sellers'  Estimate,  and Seller
shall pay the fees of such arbitrator.  If the Arbitrator's Estimate is 102% of
or less than 102% of Seller's Estimate,  Purchaser shall not be entitled to any
additional  credit  pursuant to this Section 8.6.1 and Purchaser  shall pay the
fees of such  arbitrator.  For the  purposes of this  Section  8.1.6,  the term
"substantial  completion"  or  "substantially  completed"  or words of  similar
import  shall be  deemed to mean such  stage of  completion  of the 5th and 6th
Floor  Conversion  Work as shall leave not more than $25,000 of additional cost
to complete the same.

               8.1.7 a. An amount  equal to 65% of all fixed  rents under Space
Leases which are (i) collected  prior to the Closing and (ii) applicable to the
month (or other applicable collection period) in which the Closing occurs shall
be apportioned between Sellers and Purchaser.

                     b.  If,  at  the  Closing,   any  fixed  rents  (including
electricity,  if  applicable)  are past due by any Space  Lessee,  and provided
Sellers have delivered to Purchaser,  in reasonable  detail, a breakdown of all
such past due amounts as of the Closing, Purchaser agrees that the first moneys
received by it from such Space Lessee shall be disbursed as follows:

                         (i) First,  to  Sellers  and  Purchaser,  in an amount
equal to 65% of the fixed rents (including electricity,  if applicable) for the
month of Closing, shall be apportioned;

                         (ii) Next,  to Sellers,  in an amount  equal to 65% of
all other arrearage fixed rents (including  electricity,  if applicable)  owing
under the Space Lease or Space Leases  pursuant to which the City University of
New York leases  space at the  Property  for all periods  prior to the month in
which the Closing occurs;

                         (iii)    Next   to    Purchaser    and    the    other
Tenants-in-Common  in respect of all other fixed rents (including  electricity,
if  applicable)  owing by all such Space Lessees for any period after the month
in which the Closing occurs, less the reasonable costs and expenses incurred by
the  Tenancy-in-Common in connection with the collection thereof which shall be
allowed to  Purchaser  therefrom,  until all such fixed rents have been paid in
full; and

                         (iv) An amount  equal to 65% of the  balance,  if any,
less an amount equal to 65% of the  reasonable  costs and expenses  incurred by
the Tenancy-in-Common in connection with the collection thereof, to Sellers.

               Each party agrees to remit reasonably  promptly to the other the
amount of such rents to which such party is so  entitled  and to account to the
other party monthly in respect of same.  Sellers shall have the right from time
to time for a period of one hundred eighty (180) days following the Closing, on
reasonable prior notice to Purchaser, to review Purchaser's rental records with
respect  to the  Property  to  ascertain  the  accuracy  of  such  accountings.
Purchaser  shall have the right  from time to time for a period of one  hundred
eighty (180) days following the Closing, on reasonable prior notice to Sellers,
to review Sellers' rental records with respect to the Property to ascertain the
accuracy  of such  accountings.  The fixed  rents  (including  electricity,  if
applicable)  received by Sellers  after the Closing  shall be  apportioned  and
remitted, if applicable, as hereinabove provided.

                     c. If the  Closing  shall occur prior to the time when any
rental  payments for fuel  pass-alongs,  so-called  escalation  rent or charges
based upon real estate taxes,  operating expenses,  labor costs, cost of living
increases or like items  (collectively,  "Overage Rent") is payable,  then such
Overage Rent for the applicable  accounting  period in which the Closing occurs
shall be  apportioned  subsequent to the Closing.  Purchaser  shall pay over to
Sellers,  within thirty (30) days after Purchaser's receipt thereof, a prorated
amount equal to 65% of all such Overage Rent received by the  Tenancy-in-Common
(less 65% of the  reasonable  costs and  expenses  incurred  in the  collection
thereof incurred by the Tenancy-in-Common,  which shall be allowed to Purchaser
therefrom) based upon the portion of such accounting  period which occurs prior
to the Closing (to the extent not  theretofore  collected by the Company and/or
Tenants-in-Common  on  account  of such  Overage  Rent  prior to  Closing).  In
addition,  Purchaser  shall pay to Sellers 65% of all Overage Rent (less 65% of
the  reasonable  costs and expenses  incurred by the  Tenancy-in-Common  in the
collection  thereof  which  shall be allowed to  Purchaser  therefrom)  payable
subsequent  to the Closing with respect to an  accounting  period which expired
prior to the  Closing,  within  thirty (30) days after  receipt  thereof by the
Tenancy-in-Common,  and  shall,  upon  written  request,  account to Sellers in
respect of the same.  Sellers shall furnish to Purchaser all  information  with
respect to the period prior to the Closing reasonably necessary for the billing
of such Overage Rent.  If, prior to Closing,  Sellers shall collect any sums on
account  of  Overage  Rent or fixed  rent for a year or  other  period,  or any
portion of such year or other  period,  beginning  prior but ending on or after
the Closing Date,  such sum shall be  apportioned at the Closing as of the date
of Closing as aforesaid.

                     d.  Overage  Rent  payable  by Space  Lessees  based on an
estimated  amount and subject to adjustment or  reconciliation  pursuant to the
related Space Leases subsequent to the Closing shall be apportioned as provided
in Section 8.1.7(c) and shall be  re-apportioned  as and when the related Space
Lessee's actual obligation for such Overage Rent is reconciled  pursuant to the
related Space Lease.

                     e. There shall be credited to Purchaser 65% of all prepaid
fixed rent and Overage Rent for periods on and after the Closing Date.

     The provisions of this subsection 8.1.7 shall survive the Closing.

          8.1.8 An  amount  equal to 65% of all real  estate  taxes,  unmetered
water  and  sewer  charges  and vault  charges,  if any,  and any and all other
municipal or governmental assessments of any and every nature levied or imposed
upon the  Property,  on the basis of the fiscal year or calendar year for which
assessed shall be  apportioned.  If the Closing shall occur before the tax rate
is fixed,  the  apportionment  of taxes shall be upon the basis of the tax rate
for the next preceding fiscal period applied to the latest assessed  valuation.
Promptly  after  the new tax rate is fixed for the  fiscal  period in which the
Closing  takes  place,  the   apportionment  of  real  estate  taxes  shall  be
recomputed.

          8.1.9 An amount  equal to (a) 65% of all  charges  and fees due under
telephone  contracts,  if any, and  contracts for the supply to the Property of
heat,  steam,  electric  power,  gas and light,  if any,  shall be  apportioned
between Sellers and Purchaser, and (b) 65% of all deposits, if any, made by the
Tenancy-in-Common  as security under any such public service contracts shall be
credited to Sellers if such amounts remain on deposit after the Closing for the
benefit of Purchaser).

          8.1.10 An amount equal to 65% of any charges or fees for transferable
licenses and permits for the Property.

          8.1.11 An amount equal to 65% of any charges  payable  under  Service
Contracts  shall be  apportioned  on the basis of the  period  covered  by such
payments,  including,  without  limitation,  charges  in  connection  with  the
Employees including, without limitation, salary, bonuses, vacation and sick day
allowances and pension or other benefit fund contributions.

          8.1.12 An amount equal to 65% of all fuel, if any, then stored at the
Property shall be apportioned on the basis of the Tenancy-in-Common's last cost
therefor,  including sales tax, as evidenced by a written statement of the fuel
oil  supplier for the  Property,  which  statement  shall be  conclusive  as to
quantity and cost, absent fraud.

          8.1.13  An  amount  equal  to  65%  of all  other  items  customarily
apportioned  in connection  with sales of similar  property in the State of New
York.

          8.2 If there is a water meter on the Property, Sellers shall endeavor
to  furnish a reading  to a date not more than  thirty  (30) days  prior to the
Closing Date,  and the unfixed meter charge and the unfixed sewer rent, if any,
based thereon for the  intervening  time shall be  apportioned  on the basis of
such last reading.  If Sellers fails or are unable to obtain such reading,  the
Closing shall  nevertheless  proceed and the parties shall  apportion an amount
equal to 65% of the  meter  charges  and  sewer  rents on the basis of the last
reading and bill received by the Company or the  Tenants-in-Common and the same
shall  be  appropriately  readjusted  after  Closing  on the  basis of the next
subsequent bills. Unpaid water meter and other utility charges of Space Lessees
under Space Leases at the Closing Date (whether such water and utility  charges
are determined by submetering or direct  metering) shall not be an objection to
title and Purchaser shall look solely to such Space Lessee for collection.  The
provisions of this Section 8.2 shall survive the Closing.

     9.   Closing Deliveries.

          9.1 At or prior to the  Closing,  Sellers  shall  make,  have made or
caused to be made, the following deliveries:

               9.1.1 Each  Seller  shall  execute,  acknowledge  and deliver to
Purchaser an  instrument  of  assignment  and  assumption  with respect to such
Seller's  Membership Interest in the form attached hereto as Exhibit R and made
a part hereof (the "Assignments").

               9.1.2 To the extent that  Sellers or the Company are actually in
possession of any of the following  documents and items,  Sellers shall deliver
the  same to  Purchaser  (and  with  respect  to any such  deliveries  that are
documents,  Sellers shall deliver executed originals of same, or, to the extent
Sellers or the Company are not in possession of originals,  copies of same) (a)
with respect to the Property, any Space Leases, security deposits in respect of
the Space Leases,  correspondence and other records, if any, pertaining to such
Space Leases and the Property, all keys to and all combinations to locks at the
Property  tagged  for  identification,   licenses,   permits,   warranties  and
guarantees and plans and specifications  with respect to the Property,  and (b)
with respect to the Tenancy-in-Common, the TIC Agreement. To the extent Sellers
deliver copies of any documents  under this  subsection,  Sellers shall certify
that such copies are true, correct and complete copies.

               9.1.3 Each Seller shall deliver to Purchaser a certificate, duly
executed and  acknowledged  by such Seller,  in accordance with Section 1445 of
the Internal Revenue Code of 1986, as amended (the "Code").

               9.1.4 With  respect to each of the Company,  Associates  LLC and
Nominee LLC,  Blackacre MM LLC shall  deliver to Purchaser  copies of their (a)
certificate  of formation,  (b) operating  agreement,  (c)  certificate of good
standing  dated  not  more  than  15  days  prior  to  the  Closing  Date,  (d)
qualification  to do  business  in any  jurisdiction  which such  entity has so
qualified,  (e) any consents of their  respective  members required under their
operating   agreements  to  the  transaction   contemplated   herein,  and  (f)
resolutions  authorizing the transaction  contemplated  herein,  which shall be
accompanied by a  certification  signed by the managing  member or secretary or
assistant  secretary  of such  Seller  certifying  that such  copies  are true,
complete and correct.

               9.1.5 With  respect to 57th  Associates,  Blackacre MM LLC shall
deliver to Purchaser copies of its (a) business  certificate and any amendments
thereto,  to the extent such documents have  heretofore  been filed in New York
County, and (b) partnership agreement and any amendments thereto, to the extent
the Company or either  Seller has such  documents  in their  possession,  which
shall be  accompanied  by a  certification  signed  by the  managing  member or
secretary or assistant  secretary of such Seller,  certifying that, to the best
of such person's knowledge, such copies are true, complete and correct.

               9.1.6 Sellers shall deliver to Purchaser  estoppel  certificates
(individually,  an "Estoppel" and,  collectively,  the "Estoppels") dated after
the date of this Agreement  either (a) in the form attached hereto as Exhibit S
attached hereto and made a part hereof,  or (b) in the event any Space Lessee's
Space  Lease  provides  for the form of  Estoppel  that  such  Tenant  shall be
required  to deliver to the  landlord  under such Space  Lease as set forth the
matters to be  contained in such as Estoppel in  connection  with a sale and/or
ground  lease and/or  mortgaging  of all or any part of the  Property,  then an
Estoppel in such form or  containing  those  matters with respect to such Space
Lessee,  executed and  delivered by the Space  Lessees,  provided  that Sellers
shall  only be  required  hereunder  to  deliver to  Purchaser  at the  Closing
Estoppels  from Space Lessees under Space Leases  occupying at least 65% of the
rentable  square feet at the Property and included in such  Estoppels  shall be
Estoppels  from the  following  three (3)  Space  Lessees:  (i) BMW,  (ii) City
University of New York, and (iii) Columbia Broadcasting System.

               9.1.7 If  Greenwich  Capital is  required to deliver an estoppel
certificate  under the  Greenwich  Loan  Documents  (as  hereafter  defined) in
connection with the Greenwich Loan in respect of the  transaction  contemplated
hereunder,  then Sellers  shall  deliver to  Purchaser an estoppel  certificate
executed by Greenwich  Capital in respect of the Greenwich Loan in the form set
forth in the Greenwich Loan Documents,  or if no form is set forth therein,  in
such form as Greenwich Capital shall agree to deliver.

               9.1.8 To the  extent  that the  material  underlying  facts with
respect to any of Sellers'  representations  and warranties in Sections 5.1 and
5.2 hereunder  have changed,  a certificate  of Sellers  setting forth all such
material changes to such representations and warranties.

               9.1.9  Sellers shall deliver to Purchaser a balance sheet of the
Company  which has been  audited  by David  Berdon &  Company  and is dated and
covers the  financial  position  of the  Company  as of a date no earlier  than
fifteen (15) days prior to the Closing,  which audited balance sheet shall show
no material change in the assets and liabilities of the Company as reflected on
the Company's  Balance Sheet dated as of August 31, 1998 attached as Schedule 1
except for those liabilities incurred in the ordinary course of business of the
Company  since August 31, 1998.  At Closing,  Seller shall certify to Purchaser
that the Company has not incurred any  liabilities  except as reflected on such
audited  balance  sheet other than those  liabilities  incurred in the ordinary
course of business of the Company since the date thereof.  Such audited balance
sheet shall be prepared on the same basis as the Company's Balance Sheet.


          9.2 At or prior to the Closing,  Purchaser  shall make,  have made or
caused to be made, the following deliveries:

               9.2.1  Purchaser  shall pay the  balance of the  Purchase  Price
required pursuant to Section 3.2. hereof.

               9.2.2  Purchaser  shall deliver to Sellers (a) if Purchaser is a
corporation,  copies of  Purchaser's  (i)  certificate of  incorporation,  (ii)
by-laws,   (iii)  resolutions  of  its  board  of  directors   authorizing  the
transaction contemplated by this Agreement and (iv) a good standing certificate
dated not more  than  fifteen  (15)  days  prior to the  Closing  Date,  (b) if
Purchaser is a limited  partnership,  (i) copies of Purchaser's  certificate of
limited  partnership,  (ii)  resolutions  of the general  partner of  Purchaser
authorizing the transaction  contemplated by this Agreement,  (iii) consents of
Purchaser's  partners,  if  required  under  Purchaser's  agreement  of limited
partnership  and (iv) a good standing  certificate  dated not more than fifteen
(15) days prior to the Closing  Date,  (c) if Purchaser is a limited  liability
company,  Purchaser's (i) certificate of formation,  (ii) operating  agreement,
(iii) good standing  certificate dated not more than fifteen (15) days prior to
the Closing Date, (iv) any consents of Purchaser's  members  required under the
operating agreement to the transaction  contemplated herein and (v) resolutions
authorizing  the  transaction  contemplated  herein,  which  documents shall be
accompanied  by a  certification  signed by a secretary,  assistant  secretary,
managing member,  or general partner,  as the case may be, certifying that such
copies are true, complete and correct.

          9.3 Sellers and Purchaser, at the Closing, shall prepare, execute and
deliver  to  each  other,  subject  to all the  terms  and  provisions  of this
Agreement, the following documents:

               9.3.1 An  amendment to the  Company's  operating  agreement  and
certificate of formation,  if required,  pursuant to which  Purchaser  shall be
admitted  as a member of the  Company  and  Sellers  withdraw as members of the
Company in the form attached hereto as Exhibit T and made a part hereof.

               9.3.2  Combined Real Estate  Transfer Tax Return and Credit Line
Mortgage Certificate, Form TP-584.

               9.3.3 New York City Department of Finance Real Property Transfer
Tax Return.

               9.3.4 Sellers and/or  Purchaser  shall execute and deliver those
documents required to be executed and delivered pursuant to Article 13 hereof.

               9.3.5  Sellers and  Purchasers  shall  execute and deliver  such
other  instruments and documents as may be (a) set forth in Articles 12 and 13,
and (b)  reasonably  required to effectuate  the  assignment of the  Membership
Interests  to  Purchaser  and the  admission  of  Purchaser  as a member of the
Company.

     10.  Conditions to Closing Obligations.

          10.1  Notwithstanding  anything to the contrary contained herein, the
obligation  of Sellers to close  title in  accordance  with this  Agreement  is
expressly  conditioned upon the fulfillment by and as of the time of Closing of
each of the conditions listed below,  provided that Sellers, at their election,
evidenced by written notice  delivered to Purchaser at or prior to the Closing,
may waive any of such conditions:

               10.1.1  Purchaser  shall have  executed and delivered to Sellers
all of the documents, shall have paid all sums of money and shall have taken or
caused  to be taken all of the  other  action  required  of  Purchaser  in this
Agreement.

               10.1.2 All  representations  and warranties made by Purchaser in
this  Agreement  shall be true and correct in all  material  respects as of the
date of Closing.

               10.1.3 The Greenwich Consent (as hereinafter defined) shall have
been obtained.

          10.2  Notwithstanding  anything to the contrary contained herein, the
obligation  of Purchaser to close title in  accordance  with this  Agreement is
expressly conditioned upon the fulfillment by and as of the time of the Closing
of each  of the  conditions  listed  below,  provided  that  Purchaser,  at its
election,  evidenced by written notice  delivered to Sellers at or prior to the
Closing, may waive all or any of such conditions:

               10.2.1  Sellers  shall have  executed and delivered to Purchaser
all of the  documents,  and shall  have  taken or caused to be taken all of the
other action, required of Sellers under this Agreement.

               10.2.2 All  representations  and  warranties  made by Sellers in
this  Agreement  shall be true and correct in all  material  respects as of the
Closing   Date,   except  that  to  the  extent  the  facts   underlying   such
representations  may have  changed as of the  Closing,  and Sellers  shall have
represented  in the  certificate  delivered  pursuant to subsection  9.1.8 such
changed  facts and  circumstances,  provided,  however,  that if on the Closing
Date, any such  representations  and warranties are not true and correct in all
material respects,  Purchaser shall in any event be required to close hereunder
and purchase the Membership  Interests unless the breach of any representations
and warranties  will have, in the aggregate,  a "material  adverse  effect" (as
such time is defined  below).  If  Purchaser  is  required  to close  hereunder
because Sellers breach or breaches of their  representations  and warranties do
not, in the aggregate,  have a "material  adverse  effect,"  Purchaser shall be
entitled to receive a credit in respect of the Purchase  Price in the amount of
the  reasonably  estimated  cost to cure such  breach or  breaches  and/or  the
reasonably  estimated  diminution  in  value  of the  Membership  Interests  to
Purchaser  caused  by such  breach  or  breaches,  in an  amount  not to exceed
$750,000.00.  If any breach of Sellers' representations and warranties do have,
in the aggregate, a "material adverse effect," Purchaser may elect in any event
to close  hereunder  and  acquire  the  Membership  Interests,  in which  event
Purchaser shall be entitled to a credit in respect of the Purchase Price in the
amount of  $750,000.00.  The term  "material  adverse  effect"  as used in this
Agreement shall mean a material  adverse effect on the results of operations or
financial  condition of the Company and/or  Associates LLC in an amount greater
than $750,000.00.

               10.2.3 The Greenwich Consent shall have been obtained.

               10.2.4 As of the Closing Date, there shall have been no material
liabilities  incurred by the Company  since the date of the  Company's  Balance
Sheet (either  individually  or in the  aggregate) and there shall have been no
material  liabilities  incurred by Associates  LLC since the date of Associates
LLC's Balance Sheet (either  individually  or in the  aggregate),  except those
incurred in the ordinary course of business.

               10.2.5 In the event  Purchaser  elects to obtain title insurance
from the Title Company in connection  with its  acquisition  of the  Membership
Interests,  the  Title  Company  shall  be  willing  to  insure  title  to  the
Purchaser's  interest in the Property,  pursuant to an ALTA 1992 Owner's Policy
of Title  Insurance  in the amount of the Purchase  Price at regular  rates and
without  additional  premium  (which shall be deemed to include the cost of any
endorsements  to title  requested by Purchaser),  subject only to the Permitted
Exceptions  (including,  without  limitation,  the documents  evidencing and/or
securing the Greenwich Loan) and as otherwise  provided in this  Agreement.  In
connection  with any such title policy being issued by the Title  Company,  the
Title Company shall, at Purchaser's request, be willing to provide to Purchaser
a  non-imputation  endorsement  to such  policy  at  standard  rates  for  such
endorsement  (which  cost  shall be  payable by  Purchaser)  upon  receipt of a
Non-Imputation Affidavit (the "Non-Imputation  Affidavit") in the form attached
hereto as Exhibit U and made a part hereof, and Sellers hereby agree to execute
and deliver such Non-Imputation Affidavit.

     11.  Consent of Mortgagee.

          11.1  Reference is made to that certain  first  mortgage loan made by
Greenwich Capital Financial Products, Inc. ("Greenwich Capital"), as lender, to
the Company,  Nominee LLC and CTKG,  as  borrowers,  in the original  principal
amount of $45,000,000  (the  "Greenwich  Loan"),  evidenced  and/or secured by,
among other  things,  that  certain  (a)  Consolidated,  Amended  and  Restated
Mortgage Note,  dated as of October 31, 1997, in the original  principal amount
of  $45,000,000.00  given by the Co-Tenants,  as makers,  in favor of Greenwich
Capital,  as payee (the  "Greenwich  Note"),  (b) Loan  Agreement,  dated as of
October 31, 1997, between Co-Tenants,  as borrowers,  and Greenwich Capital, as
lender  (the  "Greenwich  Loan  Agreement"),  (c)  Agreement  of  Confirmation,
Reaffirmation, Consolidation and Modification of Mortgage and Note (Fee), dated
as of October 31, 1997,  given by the  Co-Tenants,  as mortgagors,  in favor of
Greenwich Capital, as mortgagee, recorded in the Office of the City Register of
New York County (the  "Register's  Office") on August 28,  1998,  in Reel 2692,
Page 914,  which  together with the  mortgages  consolidated  therein,  as more
particularly  set forth  therein,  encumbers  the  Co-Tenants'  interest in the
Property (the "Greenwich Mortgage"),  (d) Assignment of Leases and Rents, dated
as of October 31, 1997,  between the  Co-Tenants,  as assignors,  and Greenwich
Capital, as assignee,  recorded in the Register's Office on August 28, 1998, in
Reel 2692, Page 993 (the "Greenwich Assignment of Leases"), (e) Cash Collateral
Account  Security,  Pledge and  Assignment  Agreement,  dated as of October 31,
1997, between the Co-Tenants,  as borrowers,  and Greenwich Capital,  as lender
(the "Greenwich Cash Collateral  Agreement"),  (f) Hazardous  Material Guaranty
and  Indemnification  Agreement,  dated as of October  31,  1997,  given by the
Co-Tenants  in favor of  Greenwich  Capital  (the  "Greenwich  Indemnity"  and,
together with the Greenwich Note, the Greenwich Loan  Agreement,  the Greenwich
Mortgage,  the Greenwich Assignment of Leases and the Greenwich Cash Collateral
Agreement,  and all of the other  documents and instruments  evidencing  and/or
securing and/or otherwise  delivered in connection with the Greenwich Loan, the
"Greenwich Loan Documents").

          11.2 Sellers have informed  Purchaser  that under the Greenwich  Loan
Documents,  the  consent  and  approval  of  Greenwich  Capital is  required in
connection with the assignment and sale of the Membership  Interests.  It shall
be a condition precedent to Sellers' and Purchaser's  obligation hereunder that
the  consent  of  Greenwich  Capital  be  obtained  on or  prior to the date of
Closing.  Sellers  shall use  commercially  reasonable,  good faith  efforts to
obtain the consent of Greenwich Capital to the sale of the Membership Interests
to  Purchaser  in  accordance  with  the  terms  hereof,   including,   without
limitation, the provisions of Article 13 (the "Greenwich Consent") on or before
the date that is  twenty-one  (21) days from the date  hereof  (such date being
hereinafter  referred  to as the  "Greenwich  Consent  Election  Date"),  which
Greenwich  Consent shall be subject only to (a) the payment of any fees,  costs
and expenses  imposed by Greenwich  Capital in  connection  therewith,  (b) the
preparation,  execution and delivery of appropriate  documentation  required by
Greenwich  Capital in connection  with the sale and purchase of the  Membership
Interests  (including,  without  limitation,  any  legal  opinions  that may be
required in connection  therewith),  and (c)  compliance  with other  customary
applicable  terms and  conditions  imposed by Greenwich  Capital in  connection
therewith  (including  the manner in which  Purchaser or the entity or entities
taking title to the  Membership  Interests  are  structured).  Purchaser  shall
cooperate fully with Sellers in obtaining such consent and promptly comply with
all  customary and  commercially  reasonable  requests of Greenwich  Capital in
connection therewith, including, without limitation, the execution and delivery
of any documents that Greenwich Capital or its attorneys may reasonably require
as a  condition  to  granting  the  Greenwich  Consent  and the  compliance  by
Purchaser with any changes to the organizational  documents of Purchaser or the
entities  Purchaser may  designate as permitted  hereunder to take title to the
Membership Interests;  provided, however, that in connection with obtaining the
Greenwich Consent, the following terms and conditions shall apply:

               11.2.1 Except as expressly  provided in Section 11.2.2,  neither
Sellers nor Purchaser shall be obligated to pay any fees,  costs or expenses of
any kind whatsoever to Greenwich Capital or any other third party or expend any
sums in respect of obtaining the Greenwich Consent;

               11.2.2 Sellers shall pay the legal fees and disbursements of the
attorneys  for  Greenwich  Capital  in an  amount  not to exceed  $5,000.00  in
connection  with  obtaining the Greenwich  Consent and Purchaser  shall pay all
additional legal fees and  disbursements of the attorneys for Greenwich Capital
in connection  with obtaining the Greenwich  Consent and  Purchaser's own legal
fees and disbursements in connection with obtaining the Greenwich Consent;

               11.2.3  Purchaser  shall not be obligated to execute and deliver
any document in connection  with the Greenwich  Consent  either in  Purchaser's
individual  capacity or on behalf of the Company if such document  would impose
upon  Purchaser  or the Company  obligations  in excess of those  imposed  upon
Sellers and the  Company  under the  Greenwich  Loan  Documents  as of the date
hereof;

               11.2.4  Sellers  shall not be obligated to accept any consent to
the transaction  hereunder unless such consent or other documentation  executed
and delivered in connection  therewith provides that Sellers and the principals
of Sellers, as well as any guarantors in respect of Sellers'  obligations under
the Greenwich Loan Documents, shall be released from any further obligations or
liability  under  the  Greenwich  Loan  Documents  on and after the date of the
Closing; and

               11.2.5  Purchaser  shall,  if  required  as a  condition  to the
granting of the Greenwich  Consent,  form one or more Affiliates or restructure
one or more  Affiliates,  to act as  assignees  hereunder  to take title to the
Membership  Interests as "bankruptcy  remote"  entities in accordance  with the
customary requirements of Greenwich Capital and its attorneys.

               11.3 In the event the  Greenwich  Consent is not  obtained on or
prior to the Greenwich  Consent Election Date,  either Purchaser or Sellers may
at any time thereafter,  at their respective  options,  elect to terminate this
Agreement  by sending  written  notice to the other  party of such  election to
terminate (the "Greenwich  Termination  Notice"), in which event this Agreement
shall  be  deemed  automatically   terminated,   Escrow  Agent  shall  promptly
thereafter  return the  Downpayment  hereunder to Purchaser  and neither  party
shall  have any  further  rights,  duties or  obligations  hereunder,  and this
Agreement shall be of no further force and effect, except for the provisions of
Sections  11.2.2,  17,  18, 24 and 28,  which  provisions  shall  survive  such
termination.  Notwithstanding the foregoing, in the event the Greenwich Consent
is obtained  after the Greenwich  Consent  Election  Date, but prior to (a) the
Closing  Date,  and (b) the  giving  of the  Greenwich  Termination  Notice  by
Purchaser  and/or  Sellers,  then Purchaser and Sellers shall be deemed to have
waived the right to terminate this Agreement provided in this Section.

          11.4 With respect to the Greenwich Loan, Sellers hereby represent and
warrant to Purchaser as follows:

               11.4.1 The Greenwich Loan Documents are in full force and effect
and that the Company has not  received  any notice of any  defaults  thereunder
and,  to the best of  Sellers'  actual  knowledge,  neither the Company nor the
other Co-Tenants are in default under the Greenwich Loan Documents.

               11.4.2  The  Company  has not  entered  into nor  agreed  to any
modification of the Greenwich Loan Documents.

               11.4.3 The  outstanding  principal  balance  under the Greenwich
Loan Documents is not in excess of $45,000,000.00.

               11.5 With respect to the Greenwich  Loan,  Sellers  hereby agree
that until the Closing Date or earlier termination of this Agreement,  with the
express  prior written  consent of Purchaser,  Sellers shall not (a) permit the
Company to enter into any  modification  of any of the Greenwich Loan Documents
or (b) permit the Company to exercise the right to convert the  Greenwich  Loan
to long term  fixed  rate  financing  as  permitted  under the  Greenwich  Loan
Documents.

               11.6 The  obligations  of the Company under the  Greenwich  Loan
Documents  shall survive the closing of title to the  Membership  Interests and
there shall be no  adjustment in the Purchase  Price of any kind  whatsoever in
respect of the Greenwich Loan (including on account of any  amortization of the
outstanding  principal  balance of the  Greenwich  Loan  which  results in such
outstanding principal balance being reduced below  $45,000,000.00),  Purchaser,
in  determining  the  Purchase  Price and  agreeing to same,  having taken into
account the continuing  obligations of the Company and the other Co-Tenants and
the lien against the Property created by the Greenwich Mortgage,  the Greenwich
Assignment of Rents and the other Greenwich Loan Documents.

               11.7 The  representations and warranties of Sellers contained in
Section 11.4 shall survive the Closing;  provided,  however, that to the extent
Sellers  deliver to Purchaser  the estoppel  described  in Section  9.1.7,  the
representations  and  warranties as to the matters  expressly  covered  therein
shall be deemed deleted and shall not survive the Closing.

     12.  BMW Purchase Option

          12.1  Reference  is made to that  certain  Lease,  dated as of May 1,
1996,  between  Kaufman  Newmark Realty  Corporation,  as Agent for 555 W. 57th
Associates,  as landlord,  and BMW, as tenant, as amended by (a) a Supplemental
Agreement to Lease,  dated as of May 1, 1996,  (b) a First  Amendment to Lease,
dated as of August 7, 1997 and (c) an Agreement of  Confirmation of Delivery of
Possession,  dated as of August 7,  1997  (such  Lease,  as so  amended,  being
referred to herein as the "BMW  Lease"),  pursuant to which BMW leases  certain
premises at the Property as more  particularly  set forth in the BMW Lease (the
"BMW Premises").  Pursuant to Article 40 of the BMW Lease, BMW has the right to
purchase  the  BMW  Premises  and,  in  connection  therewith,   to  cause  the
Co-Tenants,  as landlords  under the BMW Lease,  to convert the Property into a
condominium  containing  a  separate  commercial  condominium  unit for the BMW
Premises  (such  rights as are  contained  in Article 40 of the BMW Lease being
referred to herein as the "BMW  Purchase  Option"),  which BMW Purchase  Option
shall terminate on February 1, 1999 (the "BMW Option Termination Date"), if not
exercised or waived by BMW prior to such date.

          12.2 If (a) BMW has waived the BMW Purchase Option in writing in form
and substance reasonably satisfactory to Purchaser and otherwise sufficient for
the Title  Company to omit the BMW  Purchase  Option as an  exception  from any
title policy it may issue to Purchaser in connection  with the  acquisition  of
the Membership Interests or (b) BMW has taken no action with respect to the BMW
Purchase  Option by the Closing  Date and the Closing Date is on or after April
1, 1999,  there shall be no reduction  in the Purchase  Price at the Closing in
respect of the BMW Purchase Option,  and the further provisions of this Article
12 shall be of no further force and effect.

          12.3 If BMW has duly  exercised the BMW Purchase  Option prior to the
BMW Option  Termination  Date,  on the Closing  Date the  Purchase  Price (and,
therefore,  the applicable  amount payable  pursuant to Section 3.2.2) shall be
reduced  by an amount  equal to  $4,000,000.00  (the "BMW  Price  Adjustment");
provided,  however,  that if the  Closing  Date  has  occurred  prior  to BMW's
exercise of the BMW Purchase  Option,  the provisions of Section  12.6(a) shall
apply.

          12.4 If (a) after the BMW Option  Termination Date but prior to April
1, 1999 BMW has  asserted in writing  either that it (i) has  theretofore  duly
exercised the BMW Purchase Option prior to the BMW Option  Termination  Date or
(ii) remains entitled under applicable law to and does duly and timely exercise
the BMW Purchase Option (a "BMW Option  Assertion") and (b) the Closing Date is
prior to April 1, 1999, the provisions of Section 12.6(b) shall apply.

          12.5 If (a) BMW has taken no action with  respect to the BMW Purchase
Option by the Closing  Date and the Closing  Date is prior to April 1, 1999 and
(b) there shall occur a BMW Option  Assertion,  there shall be no  reduction in
the Purchase  Price at the Closing in respect of the BMW Purchase  Option,  and
the provisions of Section 12.6(b) shall apply.

          12.6  Notwithstanding  anything  to the  contrary  herein  contained,
Purchaser  shall be entitled  to receive a return of a portion of the  Purchase
Price from Sellers (a) in the case of the proviso contained in Section 12.3, in
an amount equal to the BMW Price Adjustment or (b) in the case of Sections 12.4
or 12.5, as  applicable,  in an amount equal to the lesser of (i) the BMW Price
Adjustment  or (ii) the  diminution in value of  Purchaser's  investment in the
Membership  Interests as a result of BMW's exercise of the BMW Purchase Option,
taking into account all  consideration  payable by BMW in connection  therewith
and any  cost to  Purchaser  in  effecting  a BMW  Settlement  (as  hereinafter
defined) (the "BMW Settlement Adjustment"), in the event that there shall occur
a BMW Option Assertion after the BMW Option Termination Date but prior to April
1, 1999 and BMW shall have been  determined  pursuant to an order of a court of
competent  jurisdiction  to have duly and  timely  exercised  the BMW  Purchase
Option  (together  with  Seller's  obligations  under  subdivision  (a)  above,
"Seller's Refund Obligation").  Blackacre Capital Partners,  L.P., by execution
of this Agreement at the foot hereof,  hereby  guarantees to Purchaser  payment
(and not merely the  collectibility  of) Seller's Refund Obligation as and when
required  pursuant to this Section 12.6.  Purchaser shall use all  commercially
reasonable  efforts  to defend  any BMW  Option  Assertion  and  prosecute  any
litigation arising therefrom, with counsel designated by Purchaser, and may, in
its  reasonable  judgment,  settle the same without  Sellers  consent (the "BMW
Settlement");  provided,  however,  that if there shall occur a BMW Settlement,
Purchaser shall provide written notice to Sellers (the "BMW Settlement Notice")
(i) setting forth a reasonably detailed explanation of the terms and conditions
of the BMW  Settlement,  (ii)  containing  copies of all  settlement  documents
executed in connection therewith and (iii) setting forth the portion of the BMW
Price Adjustment to which Purchaser believes,  in good faith, it is entitled as
the BMW Settlement  Adjustment (the "BMW Proposed Settlement  Adjustment").  If
Sellers  accept the BMW Proposed  Settlement  Adjustment as the BMW  Settlement
Adjustment,  the BMW Proposed  Settlement  Adjustment  shall constitute the BMW
Settlement  Adjustment  and  Sellers  shall pay to  Purchaser  Seller's  Refund
Obligation  within  ten (10) days of  Seller's  receipt  of the BMW  Settlement
Notice. If Sellers do not accept the BMW Proposed Settlement  Adjustment as the
BMW Settlement  Adjustment,  the parties shall attempt to agree upon the amount
of the BMW  Settlement  Adjustment  for a period of thirty (30) days. If, after
such thirty (30) day period, Purchaser and Sellers are still unable to agree on
the amount of the BMW  Settlement  Adjustment,  Sellers shall have the right to
cause the amount of the BMW Settlement  Adjustment to be determined pursuant to
binding  arbitration  pursuant to Section  12.7 below and Sellers  shall pay to
Purchaser the BMW Settlement Adjustment within ten (10) days of Purchaser being
notified of such determination.

          12.7 In the event that Sellers shall be entitled to arbitration under
this Article with respect to the BMW Settlement Adjustment,  the BMW Settlement
Adjustment shall be determined by a single  arbitrator  appointed in accordance
with the American Arbitration Association rules and procedures. Such arbitrator
shall be impartial  and shall have not less than ten (10) years'  experience in
the County of New York in a calling  related to the  management  of  commercial
real estate and/or the appraisal of commercial property,  including significant
experience in managing  and/or  appraising  class "A" office  buildings and the
fees of such  arbitrator  shall be shared  equally  by Sellers  and  Purchaser.
Within twenty (20) days following the appointment of such arbitrator each party
shall attend a hearing before such arbitrator wherein each party shall submit a
written report setting forth its determination of the BMW Settlement Adjustment
with such  information and evidence  contained  therein as the party submitting
such report shall deem relevant.  The arbitrator shall, within thirty (30) days
following such hearing and submission of such evidence and information,  render
a decision by either  selecting  the BMW  Settlement  Adjustment  submitted  by
either party or determining a different value that the arbitrator believes more
accurately  reflects  the BMW  Settlement  Adjustment  and the decision of such
arbitrator shall be final and binding upon the parties hereto.

          12.8 The provisions of this Article 12 shall survive the Closing.


     13.  Ford Note.

          13.1  Subject to the  provisions  of the  Greenwich  Consent,  at the
Closing,  Sellers  shall  cause the  Company  to assign  its  right,  title and
interest in the Ford Note to Sellers,  and shall cause Associates LLC to assign
its  right to  receive  its pro rata  share of all  payments  of  interest  and
principal  under the Ford  Note to  Sellers.  At the  Closing,  subject  to the
provisions  of the  Greenwich  Consent,  Sellers  and/or  Purchaser  shall,  as
indicated below, execute and deliver the following documents:

               13.1.1 A License  Agreement (the "License  Agreement")  executed
and  delivered  by  Sellers  and  Purchaser  (or its  designee(s))  in the form
attached hereto as Exhibit V and made a part hereof.

               13.1.2 A  Subordinate  Assignment of Interest in Note and Rights
to Receive Distributions (the "Subordinate  Assignment") executed and delivered
by Sellers and Purchaser (or its  designee(s))  in the form attached  hereto as
Exhibit V-1 and made a part hereof.

               13.1.3 A UCC-1  Financing  Statement  executed and  delivered by
Sellers in the form attached hereto as Exhibit V-2 and made a part hereof.

               13.1.4 To the extent  Greenwich  Capital is obligated  under the
Greenwich  Loan  Documents to pay to the Company and the other  Co-Tenants  any
monies  received  by it in  respect  of the Ford  Note,  a letter of  direction
executed and  delivered by Sellers to Greenwich  Capital to pay 65% of all such
monies to Purchaser (or its designee(s)).

               13.1.5 Sellers and Purchaser (or its designee(s))  shall deliver
such other  documents  as  Purchaser  or Sellers  shall  reasonably  request to
effectuate  the  intent  of the  provisions  of this  Article  13 and the other
documents being executed and delivered pursuant to this Article 13.

          13.2 If the Company or  Associates  LLC shall receive any payments of
interest and/or  principal under the Ford Note prior to the Closing Date, after
the Closing,  Sellers shall cause such monies to be held in trust for Purchaser
(or its  designee(s))  and to be paid over to  Purchaser  (or its  designee(s))
pursuant to the terms of the License Agreement.

          13.3 If the holder of the Greenwich Loan delivers physical possession
of the Ford Note to Sellers  upon  payment in full of the  Greenwich  Loan,  or
otherwise,  Sellers  shall  deliver the same to Purchaser  or as Purchaser  may
direct and execute an allonge of the Ford Note in favor of  Purchaser,  without
representation, warranty or recourse, except as expressly provided herein.

          13.4 Until such time as the Ford Note is paid in full,  Sellers shall
maintain their  existence.  Until that date that is one (1) year after the Ford
Note is paid in full,  Purchaser  shall,  from  time to time,  within  ten (10)
business  days of Sellers'  written  demand,  reimburse  and pay to Sellers the
actual out-of-pocket administrative expenses incurred by Sellers in maintaining
the existence of Sellers (including,  without limitation,  those costs incurred
by Sellers in connection  with  complying  with all laws  applicable to limited
liability  companies,  all accounting  fees in respect of Sellers' tax returns,
franchise taxes, legal fees incurred in connection with any annual mandatory or
desirable  compliance  or  administrative  matters,  such as  mandatory  annual
meetings  and  maintaining  minutes in  connection  therewith  and all  similar
requirements) and all costs and expenses incurred by Sellers pursuant to and in
order to comply with their  obligations  under the License Agreement and/or the
Subordinate  Assignment.  The provisions of this Section 13.3 shall survive the
Closing.


     14.  Confidentiality.

          Until the date on which the Greenwich Consent is obtained,  Purchaser
covenants and agrees that it shall not  communicate  the terms or any aspect of
(a) this Agreement and the transactions  contemplated  hereby, (b) that certain
Letter Agreement,  dated September 23, 1998,  between SL Green Realty Corp. and
Blackacre Capital  Management,  LLC, Re: Acquisition of Ownership  Interests in
555 West 57th LLC,  to any person or entity and shall  hold,  in the  strictest
confidence,  the content of any and all  information in respect of the Property
and the Company which is supplied by Sellers to Purchaser,  without the express
written consent of Seller,  in Seller's sole  discretion.  Prior to the date on
which the  Greenwich  Consent is  obtained,  Purchaser  may,  without  Sellers'
consent, disclose the terms hereof and the transactions contemplated hereby (a)
to Purchaser's advisors, consultants,  attorneys,  accountants and lenders (the
"Purchaser  Parties") without the express written consent of Sellers,  provided
that any such Purchaser  Parties to whom disclosure is made shall also agree to
keep all such information confidential in accordance with the terms hereof, and
(ii) if  Purchaser  is  required to disclose  same by law or by  regulatory  or
judicial  process or pursuant to any  regulations  promulgated  by the New York
Stock  Exchange;  provided that in such event Purchaser shall notify Sellers in
writing of such required disclosure, shall exercise all commercially reasonable
efforts to  preserve  the  confidentiality  of the  confidential  documents  or
information,  as the case may be,  including,  without  limitation,  reasonably
cooperating  with  Sellers  to obtain an  appropriate  order or other  reliable
assurance  that  confidential  treatment  will be  accorded  such  confidential
documents  or  information,  as the case may be,  by such  tribunal  and  shall
disclose only that portion of the confidential  documents or information  which
it is legally  required to  disclose.  If this  Agreement  is  terminated  such
confidentiality  shall be maintained  and  Purchaser and the Purchaser  Parties
will  destroy or  deliver to Seller,  upon  request,  all  documents  and other
materials,  and all copies  thereof,  obtained by Purchaser  and the  Purchaser
Parties in connection with this Agreement that are subject to such  confidence,
with any such destruction  confirmed by Purchaser and the Purchaser  Parties to
Sellers in writing. The foregoing  confidentiality  obligations shall not apply
to the  extent  that any such  information  is a matter of public  record or is
provided in other sources  readily  available to the real estate industry other
than as a result of disclosure by Purchaser or the Purchaser Parties. Purchaser
hereby  indemnifies  Sellers against,  and holds Sellers harmless from, any and
all claims,  losses,  damages,  liabilities  and expenses  (including,  without
limitation, attorneys' fees) arising in connection with Purchaser's obligations
under this  Article  14. In the event the  Greenwich  Consent is not  obtained,
Purchaser  shall be bound by the  provisions  of this Article 14 even after the
termination of this Agreement.  The provisions of this Article 14 shall survive
Closing.

     15.  Limitation on Liability of Parties.

          15.1 In the event  Purchaser  shall  default  in the  performance  of
Purchaser's  obligations under this Agreement and the Closing does not occur as
a result  thereof,  Sellers'  sole and  exclusive  remedy shall be, and Sellers
shall be entitled, to retain the Downpayment and any interest earned thereon as
and for full  and  complete  liquidated  and  agreed  damages  for  Purchaser's
default,  or draw down on any  Downpayment  Letter of Credit and/or  Additional
Downpayment  Letters of Credit, if applicable,  and Purchaser shall be released
from any further liability to Sellers hereunder,  except that the provisions of
Articles 11.2.2, 17, 18, 24 and 28 hereof shall survive.

          15.2 In the event that Sellers  shall default in the  performance  of
Sellers'  obligations  under this  Agreement,  Purchaser's  sole and  exclusive
remedy shall be, and  Purchaser  shall be entitled,  to either (a) instruct the
Escrow  Agent to pay to Purchaser  the  Downpayment  with the  interest  earned
thereon,  if any, and receive  from  Sellers the Title Cost upon which  Sellers
shall be released  from any further  liability to Purchaser  hereunder,  except
that the provisions of Articles 11.2.2,  17, 18, 24 and 28 hereof shall survive
or (b) seek specific performance of Sellers'  obligations  hereunder including,
in either of which events  Sellers  shall in no event  whatsoever  be liable to
Purchaser for damages of any kind  whatsoever;  provided,  however,  if Sellers
default shall be the inability to deliver the  Estoppels  under Section  9.1.7,
Purchaser's shall not be entitled to specific performance of such obligation of
Sellers;  and  provided,  further,  however,  that Sellers  hereby agree to use
commercially reasonable efforts to obtain the Estoppels required under Sections
9.1.6 and 9.1.7.

     16.  Fire or Other Casualty; Condemnation.

          16.1 Sellers agree (a) to cause the Company and the other  Co-Tenants
to  maintain  the  property  insurance  policy or  policies  in  respect of the
Property,  including  fire  and  extended  coverage  and (b) to give  Purchaser
reasonably  prompt  notice  of any  fire or  other  casualty  occurring  at the
Property of which Sellers  obtains  knowledge,  between the date hereof and the
date of the Closing, or of any actual or threatened in writing  condemnation of
all or any part of the Property of which Sellers obtains knowledge.

          16.2 If prior to the  Closing  there  shall  occur (a)  damage to the
Property  caused by fire or other  casualty which would cost  $3,750,000.00  or
more to repair, as reasonably determined by an engineer selected by Sellers and
reasonably  satisfactory  to Purchaser,  or (b) a taking by condemnation of any
material portion of the Property, then, and in either such event, Purchaser may
elect to terminate this Agreement by written notice given to Sellers within ten
(10) days after Sellers have given  Purchaser the notice referred to in Section
16.1 hereof,  or at the Closing,  whichever is earlier,  in which event Sellers
shall promptly instruct Escrow Agent, as applicable, to return to Purchaser the
Downpayment  (together  with any  interest  earned  thereon),  and shall pay to
Purchaser  the  Title  Cost  and  this  Agreement  shall  thereupon  be  deemed
terminated  and of no further  force or effect,  and neither party hereto shall
thereupon have any further obligation to the other,  except that the provisions
of Articles 11.2.2, 17, 18, 24 and 28 hereof shall survive such termination. If
Purchaser  does not elect to terminate this  Agreement,  then the Closing shall
take  place as  herein  provided,  without  abatement  of the  Purchase  Price;
provided,  however,  that subject to the rights of Greenwich  Capital under the
Greenwich Loan Documents,  to the extent the Company has actually  received any
such  proceeds  or awards  prior to the  Closing in the form of cash,  actually
theretofore  paid to the  Company,  such  funds  shall be the  Property  of the
Company up to the amount of the  Purchase  Price and shall be  retained  by the
Company  after the  Closing,  less any  amounts  (i)  actually  and  reasonably
expended  or  incurred  by the  Company in  adjusting  any  insurance  claim or
negotiating  and/or  obtaining  any  condemnation  award  (including,   without
limitation,  reasonable  attorneys fees and expenses)  and/or (ii)  theretofore
actually  and  reasonably  incurred  or  expended  by or for the account of the
Company for the cost of any protective restoration or emergency repairs made by
or on behalf of the Company (to the extent the Company has not theretofore been
reimbursed by its insurance carriers for such expenditures),  and Sellers shall
pay to Purchaser,  or allow as a credit against the Purchase  Price,  an amount
equal to (y) if the  Company's  insurance  policy  insures  only the  Company's
interest in the Property,  then the amount of the deductible under such policy,
if any, or (z) if the insurance policy is held jointly by the Co-Tenants,  then
an amount  equal to 65% of the  deductible  under such policy and, in addition,
subject to the rights of Greenwich  Capital under the Greenwich Loan Documents,
the Company  shall cause  Associates  LLC to pay to  Purchaser  any net amounts
received by Associates LLC attributable to any such casualty or condemnation in
connection  with  Associates'  ownership  interests  in  Nominee  LLC and  57th
Associates.

          16.3 If,  prior to the  Closing,  there shall occur (a) damage to the
Property  caused  by  fire  or  other  casualty  which  would  cost  less  than
$3,750,000.00 to repair,  as reasonably  determined by an engineer  selected by
Sellers  and  reasonably   satisfactory  to  Purchaser,  or  (b)  a  taking  by
condemnation  of any part of the Property  which is not material,  then, and in
either  such  event,  neither  party  shall  have the  right to  terminate  its
obligations under this Agreement by reason thereof,  but Sellers shall, subject
to the rights of Greenwich  Capital under the Greenwich Loan  Documents,  cause
the Company to assign to Purchaser at the Closing all of the Company's interest
in any insurance  proceeds or  condemnation  awards which may be payable to the
Company on account of any such fire, casualty or condemnation, or shall deliver
to Purchaser any such proceeds or awards actually  theretofore  paid, up to the
amount of the  Purchase  Price,  in each case less any amounts (i) actually and
reasonably expended or incurred by the Company in adjusting any insurance claim
or negotiating  and/or obtaining any  condemnation  award  (including,  without
limitation,  reasonable  attorneys fees and expenses)  and/or (ii)  theretofore
actually  and  reasonably  incurred  or  expended  by or for the account of the
Company for the cost of any protective restoration or emergency repairs made by
or on behalf of the Company (to the extent the Company has not theretofore been
reimbursed by its insurance carriers for such expenditures),  and Sellers shall
pay to Purchaser,  or allow as a credit against the Purchase  Price,  an amount
equal to (y) if the  Company's  insurance  policy  insures  only the  Company's
interest in the Property,  then the amount of the deductible under such policy,
if any, or (z) if the insurance policy is held jointly by the Co-Tenants,  then
an amount  equal to 64% of the  deductible  under such policy and, in addition,
subject to the rights of Greenwich  Capital under the Greenwich Loan Documents,
the Company  shall cause  Associates  LLC to pay to  Purchaser  any net amounts
received by Associates LLC attributable to any such casualty or condemnation in
connection  with  Associates'  ownership  interests  in  Nominee  LLC and  57th
Associates.

          16.4 For purposes of this Article 16, a taking of a material  part of
the Property  shall mean any taking that either (a) diminishes the value of the
Property by an amount in excess of $3,750,000.00, or (b) which leaves remaining
a balance of such the Property which may not be  economically  operated  (after
appropriate restoration) for the purpose for which the Property was operated or
intended to be operated prior to such taking.

          16.5 In the event Purchaser does not elect to terminate the Agreement
in accordance with Section 16.2 above, or upon the occurrence of the events set
forth in Section  16.3 (a) or (b)  above,  Purchaser  shall have the  exclusive
right to  negotiate,  compromise  or contest  the  obtaining  of any  insurance
proceeds and/or any condemnation awards.

     17.  Brokerage.

          Purchaser and Sellers each represent and warrant to the other that it
has not dealt with any  broker,  consultant,  finder or like agent who might be
entitled to a commission or  compensation on account of introducing the parties
hereto,  the  negotiation  or execution of this Agreement or the closing of the
transactions  contemplated  hereby except Capital  Trust,  and Sellers shall be
responsible for any fees or commission due Capital Trust pursuant to a separate
agreement  between  Sellers and Capital  Trust.  Sellers agree to indemnify and
hold  Purchaser and its  respective  successors  and assigns  harmless from and
against  all claims,  losses,  liabilities  and  expenses  (including,  without
limitation,  reasonable attorneys fees and disbursements) which may be asserted
against,  imposed  upon or incurred by Purchaser by reason of any claim made by
any broker,  consultant,  finder or like agent  (including  Capital  Trust) for
commissions  or other  compensation  for  bringing  about this  transaction  or
claiming to have introduced Purchaser to the Sellers or the Property. Purchaser
agrees to  indemnify  and hold  Sellers  and their  respective  successors  and
assigns harmless from and against all claims, losses,  liabilities and expenses
(including,  without limitation,  reasonable  attorneys fees and disbursements)
which may be  asserted  against,  imposed  upon or  incurred  by either or both
Sellers by reason of any claim made by any broker,  consultant,  finder or like
agent (other than Capital  Trust) for  commissions  or other  compensation  for
bringing about this  transaction or claiming to have  introduced the Sellers or
the Property to Purchaser.  The provisions of this Article 17 shall survive the
Closing or other termination of this Agreement.

     18.  Closings Costs; Fees and Disbursements of Counsel, etc..

          At the  Closing,  Sellers  shall pay the New York State  Real  Estate
Transfer  Tax imposed  pursuant to Article 31 and Section  1402 of the New York
Tax Law (the "State Transfer Tax") and the New York City Real Property Transfer
Tax  imposed   pursuant  to  Title  11,  Chapter  21,  of  the  New  York  City
Administrative  Code ("City Transfer Tax"),  upon or payable in connection with
the transfer of the Membership  Interests,  which taxes and charges  shall,  at
Sellers' election by notice given to Purchaser at least three (3) days prior to
the  Closing  Date,  be  allowed  for out of the  Purchase  Price  and  paid by
Purchaser on behalf of Sellers. Sellers and Purchaser shall each execute and/or
swear to the returns or statements  required in  connection  with the aforesaid
taxes. All such tax payments shall be made payable directly to the order of the
appropriate  governmental  officer or the Title  Company.  Each of the  parties
hereto  shall  bear  and pay the  fees and  disbursements  of its own  counsel,
accountants   and  other  advisors  in  connection  with  the  negotiation  and
preparation of this  Agreement and the Closing.  The provisions of this Article
18 shall survive the Closing.

     19.  Notices.

          Except as otherwise provided in this Agreement, all notices, demands,
requests, consents, approvals or other communications (for the purposes of this
Article  collectively  referred to as  "Notices")  required or  permitted to be
given hereunder or which are given with respect to this Agreement,  in order to
constitute  effective notice to the other party,  shall be in writing and shall
be deemed to have been given when (a) personally delivered with signed delivery
receipt  obtained,  (b) when transmitted by facsimile  machine,  if followed by
giving  of,  pursuant  to one of the other  means set forth in this  Article 19
before the end of the first business day  thereafter,  printed  confirmation of
successful  transmission  to the  appropriate  facsimile  number of the address
listed below as obtained by the sender from the sender's facsimile machine, (c)
upon receipt, when sent by prepaid reputable overnight courier or (d) three (3)
days  after  the date so  mailed  if sent  postage  prepaid  by  registered  or
certified mail, return receipt requested, in each case addressed as follows:

          If to Sellers, to:

               Blackacre Capital Management, LLC
               450 Park Avenue
               New York, New York  10022
               Attention:  Jeffrey B. Citrin
               Facsimile:  (212) 758-5305

          with a copy to:

               Craig H. Solomon, Esq.
               Solomon and Weinberg LLP
               70 East 55th Street
               New York, New York 10022
               Facsimile: (212) 605-0999

          If to Purchaser, to:

               SL Green Realty Corp.
               70 East 36th Street
               New York, New York  10018-8007
               Attention:  Benjamin Feldman, Esq.
               Facsimile:  (212) 594-0086

          with a copy to:

               Greenberg, Traurig
               200 Park Avenue
               New York, New York  10166
               Attention: Robert Ivanhoe, Esq.
               Facsimile: (212) 801-6400

          If to Escrow Agent, to:

               Craig H. Solomon, Esq.
               Solomon and Weinberg LLP
               70 East 55th Street
               New York, New York 10022
               Facsimile: (212) 605-0999


          Notices shall be valid only if served in the manner provided above.

     20.  Survival; Governing Law.

          Except  as  otherwise  expressly  set  forth in this  Agreement,  the
provisions of this Agreement shall not survive the Closing provided for herein.
This  Agreement  shall be governed by,  interpreted  under,  and  construed and
enforced in accordance with, the laws of the State of New York.

     21.  Counterparts; Captions.

          This Agreement may be executed in  counterparts,  each of which shall
be deemed an original.  The captions are for  convenience of reference only and
shall not affect the construction to be given any of the provisions hereof.

     22.  Entire Agreement; No Third Party Beneficiaries.

          This Agreement (including all exhibits annexed hereto),  contains the
entire agreement  between the parties with respect to the subject matter hereof
and supersedes all prior  understandings,  if any, with respect  thereto.  This
Agreement may not be modified, changed, supplemented or terminated, nor may any
obligations  hereunder be waived,  except by written  instrument  signed by the
party to be charged or by its agent duly  authorized in writing or as otherwise
expressly  permitted  herein.  The  parties do not intend to confer any benefit
hereunder on any person, firm or corporation other than the parties hereto. The
provisions of this Article shall survive the Closing.

     23.  Waivers; Extensions.

          No  waiver  of  any  breach  of any  agreement  or  provision  herein
contained  shall be  deemed a waiver  of any  preceding  or  succeeding  breach
thereof or of any other agreement or provision herein  contained.  No extension
of time for performance of any obligations or acts shall be deemed an extension
of the time for performance of any other obligations or acts.

     24.  No Recording.

          The  parties  hereto  agree  that  neither  this  Agreement  nor  any
memorandum or notice hereof shall be recorded.

         25.      Assignments.

          Purchaser   shall   neither   assign  its  rights  nor  delegate  its
obligations  hereunder without obtaining Sellers' prior written consent,  which
may be withheld in Sellers' sole  discretion.  Notwithstanding  the  foregoing,
Purchaser  shall have the right to assign its rights  hereunder  to one or more
Affiliates of Purchaser  without the consent of Sellers,  provided that written
notice of such assignment is given to Sellers and each such assignee remains an
Affiliate  of Purchaser  through the Closing  Date and  provided  that any such
permitted  assignment shall not relieve Purchaser of its duties and obligations
hereunder.  Any other purported or attempted  assignment or delegation  without
obtaining  Sellers' prior written  consent shall be void and of no effect.  For
purposes of this Article 25 or as elsewhere  used in this  Agreement,  the term
"Affiliate"  means any entity which directly or indirectly  through one or more
intermediaries  controls,  is  controlled  by or is under  common  control with
Purchaser.  For  purposes  of this  definition,  the term  "control"  means the
possession,  directly  or  indirectly,  of the  power to  direct  or cause  the
direction of the  management  and  policies of the entity in question,  whether
through the  ownership of voting stock,  by contract or  otherwise.  No consent
given by  Sellers  to any  transfer  or  assignment  of  Purchaser's  rights or
obligations  hereunder shall be construed as a consent to any other transfer or
assignment  of  Purchaser's  rights or  obligations  hereunder.  No transfer or
assignment in violation of the provisions hereof shall be valid or enforceable.

     26.  Pronouns; Joint and Several Liability.

          All pronouns and any  variations  thereof shall be deemed to refer to
the masculine,  feminine or neuter,  singular or plural, as the identity of the
parties  may  require.  If  Purchaser  consists  of two or  more  parties,  the
liability of such parties shall be joint and several.

     27.  Successors and Assigns.

          This  Agreement  shall  bind and  inure  to the  benefit  of  Seller,
Purchaser and their respective permitted successors and assigns.

     28.  Escrow.

          28.1 Escrow Agent shall hold the Downpayment  (which, for the purpose
of this  Article 28,  shall be deemed to mean and include all  Additional  Cash
Downpayments  actually  received by Escrow  Agent),  together with all interest
earned  thereon,  in its  interest  bearing  escrow  account and shall hold the
Downpayment  Letter of Credit (which, for purposes of this Article 28, shall be
deemed  to mean and  include  all  Additional  Downpayment  Letters  of  Credit
actually received by Escrow Agent), in accordance with the following:

               28.1.1  Escrow Agent shall hold the  Downpayment,  together with
all interest  earned  thereon,  in Escrow  Agent's  escrow account at Citibank,
N.A., and shall cause the Downpayment to earn interest at Citibank, N.A.'s then
prevailing insured money market rates on deposits of similar size. Escrow Agent
shall have no  liability  for any  fluctuations  in the  interest  rate paid by
Citibank, N.A. on the Downpayment, and is not a guarantor thereof.

               28.1.2 If Escrow Agent  receives a written notice signed by both
Sellers and  Purchaser  stating  that the Closing has occurred and that Sellers
are  entitled  to receive the  Downpayment  (or that  Purchaser  is entitled to
return of the Downpayment  Letter of Credit, as applicable,  Escrow Agent shall
deliver the Downpayment,  together with the interest earned thereon, to Sellers
or deliver the  Downpayment  Letter of Credit to Purchaser,  as applicable.  If
Escrow Agent  receives a written  notice  signed by both Sellers and  Purchaser
that this Agreement has been terminated or canceled, Escrow Agent shall deliver
the Downpayment,  together with the interest thereon, or the Downpayment Letter
of Credit, as applicable, as directed therein.

               28.1.3 If Escrow  Agent  receives  a written  request  signed by
Purchaser or Sellers (the  "Noticing  Party")  stating that this  Agreement has
been  canceled or  terminated  and that the  Noticing  Party is entitled to the
Downpayment or the Downpayment  Letter of Credit,  as applicable,,  or that the
other party hereto (the "Non-Noticing  Party") has defaulted in the performance
of its  obligations  hereunder,  Escrow  Agent shall mail (by  certified  mail,
return receipt requested) a copy of such request to the Non-Noticing Party. The
Non-Noticing  Party  shall  have the right to object  to such  request  for the
Downpayment or the  Downpayment  Letter of Credit,  as  applicable,  by written
notice of  objection  delivered  to and  received by Escrow Agent ten (10) days
(excluding Saturdays, Sundays and State of New York and Federal holidays) after
the date of Escrow Agent's mailing of such copy to the Non-Noticing  Party, but
not thereafter.  If Escrow Agent shall not have so received a written notice of
objection  from  the  Non-Noticing   Party,  Escrow  Agent  shall  deliver  the
Downpayment,  together  with the  interest  earned  thereon or the  Downpayment
Letter of Credit,  as applicable,  to the Noticing Party. If Escrow Agent shall
have received a written notice of objection within the time herein  prescribed,
Escrow  Agent  shall  refuse to comply  with any  requests or demands on it and
shall  continue to hold the  Downpayment,  together  with any  interest  earned
thereon or the Downpayment Letter of Credit, as applicable,  until Escrow Agent
receives  either (a) a written  notice  signed by both  Sellers  and  Purchaser
stating who is entitled to the  Downpayment  (and interest) or the  Downpayment
Letter of Credit,  as applicable,  or (b) a final order of a court of competent
jurisdiction  directing  disbursement  (or  delivery) of the  Downpayment  (and
interest) or the  Downpayment  Letter of Credit,  as applicable,  in a specific
manner, in either of which events Escrow Agent shall then disburse (or deliver)
the  Downpayment,  together with the interest earned thereon or the Downpayment
Letter of Credit,  as  applicable,  in  accordance  with such  notice or order.
Escrow Agent shall not be or become  liable in any way or to any person for its
refusal to comply  with any such  requests  or demands  until and unless it has
received a direction of the nature described in clause (a) or (b) above.

          28.2 Any notice to Escrow Agent shall be sufficient  only if received
by Escrow  Agent  within  the  applicable  time  period set forth  herein.  All
mailings  and notices from Escrow Agent to Sellers  and/or  Purchaser,  or from
Sellers and/or Purchaser to Escrow Agent, provided for in this Article 28 shall
be  addressed  to the party to receive  such  notice at its notice  address set
forth in Article 19 above (with copies to be similarly  sent to the  additional
persons  therein  indicated),  but the provisions of Article 19 relating to the
manner  of  giving  notices  and the  effective  dates  thereof  shall  have no
application to the provisions of this Article 28.

          28.3  Notwithstanding  the  foregoing,  if Escrow  Agent  shall  have
received a written  notice of objection as provided for in Section 28.1.3 above
within the time therein  prescribed,  or shall have received at any time before
actual  disbursement (or delivery) of the Downpayment or the Downpayment Letter
of  Credit,  as  applicable,  a written  notice  signed by  either  Sellers  or
Purchaser disputing entitlement to the Downpayment or the Downpayment Letter of
Credit,  as applicable,  or shall  otherwise  believe in good faith at any time
that a  disagreement  or dispute has arisen  between  the  parties  hereto over
entitlement  to the  Downpayment  or  the  Downpayment  Letter  of  Credit,  as
applicable (whether or not litigation has been instituted),  Escrow Agent shall
have the right,  upon  written  notice to both  Sellers and  Purchaser,  (a) to
deposit the  Downpayment,  together with the interest  earned  thereon,  or the
Downpayment  Letter of Credit,  as  applicable,  with the Clerk of the Court in
which any litigation is pending and/or (b) to take such reasonable  affirmative
steps as it may,  at its  option,  elect in order to  terminate  its  duties as
Escrow Agent, including, without limitation, the depositing of the Downpayment,
together with the interest earned thereon, or the Downpayment Letter of Credit,
as applicable,  with a court of competent  jurisdiction and the commencement of
an action  for  interpleader,  the costs  thereof to be borne by  whichever  of
Sellers or Purchaser is the losing party,  and thereupon  Escrow Agent shall be
released of and from all  liability  hereunder  except for any  previous  gross
negligence or willful misconduct.

          28.4  Escrow  Agent  is  acting   hereunder   without  charge  as  an
accommodation  to Purchaser and Sellers,  it being  understood  and agreed that
Escrow  Agent  shall not be liable for any error in judgment or any act done or
omitted by it in good faith or pursuant to court  order,  or for any mistake of
fact or law.  Escrow  Agent  shall not incur any  liability  in acting upon any
document or instrument  believed thereby to be genuine.  Escrow Agent is hereby
released and exculpated from all liability  hereunder,  except only for willful
misconduct  or gross  negligence.  Escrow  Agent  may  assume  that any  person
purporting to give it any notice on behalf of any party has been  authorized to
do so. Escrow Agent shall not be liable for, and  Purchaser and Sellers  hereby
jointly and  severally  agree to  indemnify  Escrow  Agent  against,  any loss,
liability  or expense,  including  reasonable  attorney's  fees (either paid to
retained  attorneys or,  representing the fair value of legal services rendered
by Escrow Agent to itself),  arising out of any dispute  under this  Agreement,
including  the cost and expense of defending  itself  against any claim arising
hereunder. Notwithstanding anything to the contrary herein contained, Purchaser
agrees that Solomon and Weinberg LLP may represent  Sellers as Sellers' counsel
in any action,  suit or other  proceeding  between  Sellers and Purchaser or in
which Sellers and Purchaser may be involved.

     29.  Tax Proceedings.

          29.1 Purchaser  hereby  acknowledges  and agrees that the Company and
the other Co-Tenants  shall continue,  from and after the date hereof until the
Closing,  the  proceeding or  proceedings  now pending for the reduction of the
assessed valuation of the Property described on Exhibit N, and Purchaser agrees
that  Sellers  may,  until the Closing in their  reasonable  discretion  at the
Co-Tenants' sole cost and expense, cause the Company to litigate or settle same
with Purchaser's  consent as to the current tax year, if applicable,  not to be
unreasonably withheld;  provided,  however, that Purchaser shall be entitled to
65% of that portion of any refund  relating to the period  occurring  after the
Closing  after  payment to the  Company of all costs and  expenses,  including,
without limitation,  reasonable  attorneys fees and disbursements,  incurred by
the Company in  obtaining  such  refund.  Purchaser  shall after the Closing in
connection  with any  settlement  of taxes for the current tax year  deliver to
Sellers,  reasonably  promptly after request therefor,  receipted tax bills and
canceled  checks  used in payment of such taxes and shall  execute  any and all
consents  or  other  documents,  and do any  act or  thing  necessary  for  the
collection  of such refund by the Company.  Any refunds or credits  (i.e.,  any
credits for future taxes  received by the Company and other  Co-Tenants in lieu
of a refund arising out of a settlement or proceeding in connection  with taxes
that relate to periods  prior to the Closing  Date) to which the Company may be
entitled  prior to the Closing Date in respect of its direct  tenancy-in-common
ownership  interest  in  the  Property,  as  well  as  any  refund  or  credits
attributable  to Associates LP's indirect  ownership  interest in the Property,
for any periods  prior to the Closing  Date (less 65% of all costs and expenses
incurred  by the  Tenancy-in-Common  in respect of  obtaining  such  refunds or
credits) shall remain the sole property of Sellers.  From and after the Closing
Date,  (a)  Purchaser  shall  cause the  Company  to  litigate  and  settle any
proceedings  that are  pending at the time of Closing  that  relate only to any
period or periods  prior to the  Closing in the manner  directed by Sellers and
subject  to Sellers  consent,  and (b)  Purchaser  shall  cause the  Company to
litigate  and settle any  proceedings  that are  pending at the time of Closing
that relate to periods that are both prior to and on and after the Closing Date
as well as prior to the Closing Date in a  commercially  reasonable  manner and
any settlement in connection  with any such  proceeding  that involves  periods
both before and after the Closing  Date shall be subject to Sellers'  approval,
such approval not to be unreasonably withheld, and Purchaser shall keep Sellers
fully  apprised of and provide  Sellers with copies of all  correspondence  and
documents  relating to any such proceedings  referred to in clauses (a) and (b)
above,   and  upon  the  settlement  or  successful   litigation  of  any  such
proceedings,  Purchaser  shall  cause the  Company to pay to Sellers 65% of any
savings in real estate taxes that result from any such settlement or proceeding
with respect to periods prior to the Closing Date,  less the  reasonable  costs
and expenses incurred in connection therewith.

          29.2 Sellers hereby advise  Purchaser  that the Co-Tenants  intend to
enter  into a  settlement  with The City of New York with  respect to tax years
1991/1992  through and including  1997/1998 and in all events covering  periods
prior to the Closing Date.  Notwithstanding  anything to the contrary contained
in this  Article  29,  both  prior to and after the  Closing  Sellers  shall be
entitled  to cause the  Company  to accept  the City of New  York's  proffer in
respect  of such tax  years or  otherwise  settle  the  same in  Seller's  sole
discretion,  and Purchaser  shall cause the Company to pay to Sellers an amount
equal to 65% of such settlement  (less an amount equal to 65% of the reasonably
estimated  costs  and  expenses   incurred  by  the  Co-Tenants  in  connection
therewith),  promptly  upon receipt by the  Co-Tenants  of the proceeds of such
settlement (whether by refund or credit against future taxes).

          29.3 The provisions of this Article 29 shall survive the Closing.

     30.  Leasing.

          Subject to the terms of the Greenwich Loan  Documents,  Sellers shall
not  cause  the  Company  to enter  into any new Space  Leases,  or modify  any
existing Space Leases,  without the prior written  consent of Purchaser,  which
consent may be withheld in Purchaser's reasonable discretion,  provided that if
any such  proposed  lease will  contain  economic  and other  terms that are in
conformity  with the  economic and other terms in  comparable  class "A" office
buildings,  the Company may enter into such lease without Purchaser's  consent,
so  long as the  terms  of such  proposed  lease  do not  violate  the  leasing
parameters then in effect under the Greenwich Loan Documents.  It is understood
and agreed that (a) the exercise by any Space Lessee of any option set forth in
such Space Lessee's Space Lease for the (i) extension of such Space Lease, (ii)
letting of additional  space or (iii) surrender of any space demised under such
Space Lease,  (b) the Company's  consent to any request for the sublease under,
or  assignment  of, any Space Lease  requiring  the consent of the Company,  as
landlord,  where landlord's consent is required not to be unreasonably withheld
(or language  having  similar  effect) if the Space Lessee so  requesting  such
consent  shall  remain  liable under such Space Lease and such Space Lease does
not  entitle  the  landlord   thereunder  to  "recapture"   the  space  demised
thereunder,  shall not constitute a new Space Lease or the  modification  of an
existing Space Lease under this Article 30 and (c) Purchaser  shall pay, if the
Closing occurs, all leasing commissions and tenant improvement costs payable in
connection  with any new Space Lease which has been approved by Purchaser under
this Article 30, which leasing  commissions and tenant improvements costs shall
be pro-rated taking into account the periods when each of Sellers and Purchaser
received the benefits of such new Space Lease.  Without limiting the foregoing,
Sellers shall use  commercially  reasonably  efforts to cause all landlord work
required in  connection  with the Space Lease with the City  University  of New
York to be substantially completed on or prior to December 27, 1998.

     31.  Indemnity for Certain Transfer Taxes.

          Reference is made to that  certain  In-Kind  Distribution  Agreement,
dated as of October 31, 1997, between the Co-Tenants (the "In-Kind Distribution
Agreement").  Sellers hereby  indemnify  Purchaser and hold Purchaser  harmless
from and against all  claims,  losses,  liabilities  and  expenses  (including,
without limitation,  reasonable  attorneys fees and disbursements) which may be
asserted against, imposed upon or incurred by Purchaser in respect of any State
Transfer Tax and City Transfer Tax in connection with the property  distributed
pursuant to the In-Kind Distribution Agreement.  The provisions of this Article
31 shall survive the Closing.

     32.  Further Assurances.

          The parties  each agree to do such other and further acts and things,
and to execute and deliver such  instruments  and  documents  (not creating any
obligations  additional to those otherwise imposed by this Agreement) as either
may reasonably request from time to time,  whether at or after the Closing,  in
furtherance of the purposes of this Agreement.



                         [NO FURTHER TEXT ON THIS PAGE]









          IN WITNESS WHEREOF,  the parties have duly executed this Agreement as
of the day and year first above written.

                                 SELLERS:

                                 BLACKACRE 555 WEST 57TH
                                 STREET MM LLC
                                   a Delaware limited liability company

                                   By:  Blackacre Capital Group, L.P.,
                                          a Delaware limited partnership
                                          Managing Member

                                        By:  Blackacre Capital Management Corp.
                                               a Connecticut corporation,
                                               General Partner


                                               By: _______________________
                                                   Name: Jeffrey B. Citrin
                                                   Title:   President

                                   BLACKACRE 555 WEST 57TH
                                   STREET LLC

                                   By:  Blackacre Capital Group, L.P.,
                                          a Delaware limited partnership,
                                          Managing Member

                                        By:  Blackacre Capital Management Corp.,
                                               a Connecticut corporation,
                                               General Partner

                                   PURCHASER:

                                   SL GREEN OPERATING PARTNERSHIP, L.P.

                                   By:  SL Green Realty Corp.,
                                         a Maryland corporation,
                                         General Partner


                                        By:  ___________________________
                                             Name:
                                             Title:


ESCROW AGENT:

       SOLELY FOR THE PURPOSES OF
       CONFIRMING THE PROVISIONS OF
       ARTICLE 28:

SOLOMON AND WEINBERG LLP


By:  ______________________________
       Craig H. Solomon, a Partner

SOLELY FOR THE PURPOSE OF
CONFIRMING THE GUARANTEE
SET FORTH IN SECTION 12.3.1:

BLACKACRE CAPITAL PARTNERS, L.P.,
   a Delaware limited partnership
   Managing Member

   By: Old Stand Real Estate, LLC,
        a Delaware limited liability company,
        General partner


        By: ___________________________
              Name: Jeffrey B. Citrin
              Title:   President







                                   EXHIBIT A

                       Legal Description of the Property







                                   EXHIBIT B

                         Escrow Agent Wire Instructions


Institution: Citibank, N.A.
             111 Wall Street
             New York, New York  10043

Citibank, N.A. Contact:  Len Stein  (201) 487-6800


ABA No.: 021-000-089

For Credit to:    Solomon and Weinberg LLP Attorney Trust Account
                  Account No. 4326-3812







                                  EXHIBIT B-1

                    Form of Bank of Boston Letter of Credit


CLEAN STANDBY CREDIT
                                                        DATE _________________
                                                        MAIL _________________
                                  All drafts drawn must be marked: ___________
                                  Opener's Reference No.: ____________________

[Addressed to Sellers]

Gentlemen:

         By the order of SL Green Operating Partnership,  L.P., as escrow agent
we  hereby  open in your  favor  our  Irrevocable  Credit  for the  account  of
_________________ __________________ for a sum or sums not exceeding a total of
US   $_________________   (_____________________________________   US  DOLLARS)
available by your draft(s) at SIGHT on BankBoston,  N.A., Boston, Massachusetts
effective ___________ ___________________ and expiring at Boston, Massachusetts
on _____________________.

Drafts must be accompanied by:

Your signed statement certifying: "The amount of our draft represents funds due
us under a certain  Sale-Purchase  Agreement,  dated October __, 1998,  between
ourselves and SL Green Operating  Partnership,  L.P., demand for payment and/or
compliance with the  obligations  under such  Sale-Purchase  Agreement has been
made, as appropriate, and the required payment has not been received by us from
SL Green  Operating  Partnership,  L.P.  or from any other  source  and/or  the
required compliance with the obligations under such Sale-Purchase Agreement has
not been  performed  as required  under said  agreement  by SL Green  Operating
Partnership, L.P. or by any other source."

Each draft must bear on its face the clause  "Drawn  under Letter of Credit No.
___________   dated   _________________,    of   BankBoston,    N.A.,   Boston,
Massachusetts."

Except so far as otherwise  expressly  stated herein,  this letter of credit is
subject to the  "Uniform  Customs and Practice for  Documentary  Credits  (1983
Revision), International Chamber of Commerce Publication 400."

We hereby  agree with you that drafts  drawn under and in  compliance  with the
terms of this letter of credit will be duly  honored if  presented to the above
mentioned drawee Bank on or before (expiration date)
- --------------------- .

Kindly  address  all  correspondence  regarding  this  letter  of credit to the
attention  of  our  Letter  of  Credit  Operations,   P.O.  Box  1763,  BOSTON,
MASSACHUSETTS  02105,  attention  __________________,  mentioning our reference
number   as  it   appears   above.   Telephone   inquiries   can  be   made  to
_______________________________.

                                               Very truly yours,


                                               ----------------------------
                                                   Authorized Signature






                                  EXHIBIT B-2

                                   Ford Note






                                   EXHIBIT C

                       Operating Agreement of Nominee LLC







                                   EXHIBIT D

                     Operating Agreement of Associates LLC







                                   EXHIBIT E

                                 TIC Agreement







                                   EXHIBIT F

                   Property Management and Leasing Agreement







                                   EXHIBIT G

                                  Space Leases







                                   EXHIBIT H

                                   Rent Roll







                                   EXHIBIT I

                         Tenant Improvement Allowances







                                   EXHIBIT J

                              Payable Commissions






                                  EXHIBIT J-1

                              Material Litigation






                                   EXHIBIT K

                                   Employees







                                   EXHIBIT L

                                Mobil Indemnity







                                   EXHIBIT M

                                 Ford Indemnity







                                   EXHIBIT N

                           Tax Certiorari Proceedings







                                   EXHIBIT O

                     Service Contracts and Utility Deposits







                                   EXHIBIT P

                          5th and 6th Floor Conversion







                                   EXHIBIT Q

                       Permitted Title Matters of Record






                                   EXHIBIT R

            Form of Assignment and Assumption of Membership Interest


                ASSIGNMENT AND ASSUMPTION OF MEMBERSHIP INTEREST


          ASSIGNMENT AND ASSUMPTION OF MEMBERSHIP  INTEREST (the "Assignment"),
dated as of  _____________,  1998,  between  [BLACKACRE 555 WEST 57TH STREET MM
LLC]/[BLACKACRE  555 WEST  57TH  STREET  LLC],  a  Delaware  limited  liability
company,  having an office c/o Blackacre Capital Group,  L.P., 450 Park Avenue,
New York,  New York 10022  ("Assignor"),  and SL GREEN  OPERATING  PARTNERSHIP,
L.P., a Delaware limited partnership,  having an office at 70 West 36th Street,
New York, New York 10018-8007 ("Assignee").


                              W I T N E S S E T H:


          WHEREAS,  Assignor  is a member  of 555 West  57th  LLC,  a  Delaware
limited  liability  company (the "Company") formed pursuant to that certain (a)
Certificate of Formation of 555 West 57th LLC, dated August 19, 1997, and filed
in the Office of the  Secretary of State of the State of Delaware on August 20,
1997, and (b) Amended and Restated Limited  Liability  Company Agreement of 555
West 57th LLC, dated as of October 30, 1997 (the "Operating Agreement"); and

          WHEREAS, Assignor currently owns a ____ % membership interest in, and
is  [the  managing  member]  [a  non-managing  member]  of,  the  Company  (the
"Interest"); and

          WHEREAS,  Assignor  wishes to assign the  Interest to  Assignee,  and
Assignee desires to accept the assignment of the Interest; and

          WHEREAS, the Company and the other members of the Company have agreed
to consent to the assignment of the Interest to Assignee.

          NOW, THEREFORE,  for Ten Dollars ($10.00) and other good and valuable
consideration,  the receipt and sufficiency of which is hereby  acknowledged by
Assignee and Assignor, the parties hereto hereby agree as follows:

          1. Assignor hereby assigns,  sells, transfers and conveys to Assignee
its entire Interest,  including,  without limitation,  all of Assignor's right,
title and interest in and to all profits, losses,  distributions and capital of
the  Company  and  all  of  Assignor's  rights  to be and  act as a  [managing]
[non-managing]  member of the Company, and any and all other rights of Assignor
under the  Operating  Agreement  or  otherwise  as a member of the  Company  in
connection with the assets of the Company.

          2.  Assignor  hereby  withdraws  from the  Company as a member of the
Company. From and after the date hereof,  Assignor shall have no further right,
title or interest in the Company or any of the assets thereof and shall have no
further  rights,  liabilities or obligations  under the Operating  Agreement or
otherwise in connection with the Company or the assets thereof. Assignor hereby
expresses its intention that Assignee  shall become a substitute  member in its
place.

          3. Assignee hereby accepts the assignment hereunder and hereby agrees
to be bound by each and every  provision of the Operating  Agreement in respect
of the  Interest  from and after the date hereof and  assumes  all  obligations
under the  Operating  Agreement  in respect of the Interest  accruing  from and
after the date hereof.

          4. By their execution and delivery of this Assignment where indicated
below,  the managing member of the Company hereby consents to the assignment of
the  Interest,  the  withdrawal  of Assignor as a member of the Company and the
admission of Assignee as a member of the Company.

          5. Each party hereby agrees to execute such further  documents as may
be required or desirable by the other party in order to  effectuate or evidence
the  assignment  set forth herein,  the withdrawal of Assignor from the Company
and the  admission of Assignee as a member of the Company,  including,  without
limitation, an amendment to the Operating Agreement.

          6. This Assignment may be executed in several  counterparts,  each of
which shall for all  purposes  constitute  but one  agreement,  binding on each
party hereto.

          7. This Assignment shall be construed and enforced in accordance with
the laws of the State of New York.





          IN WITNESS WHEREOF,  the undersigned have executed this Assignment as
of the day and year first above written.

                                   ASSIGNOR:

                                   [BLACKACRE 555 WEST 57TH
                                   STREET MM LLC]/
                                   [BLACKACRE 555 WEST 57TH
                                   STREET LLC]

                                   By:  Blackacre Capital Group, L.P.,
                                        Its Managing Member


                                   By:  __________________________________
                                         a _______________________________
                                           General Partner

                                   ASSIGNEE:

                                   [SL GREEN OPERATING PARTNERSHIP, L.P.,
                                   a Delaware limited partnership]


                                   By: __________________________,
                                        a ________________________,
                                        General Partner


                                        By: ________________________
                                             Name:
                                             Title:
AGREED AND CONSENTED TO
THIS ____ DAY OF ________, 199__

BLACKACRE 555 WEST 57TH
STREET MM LLC, Managing Member

By:  Blackacre Capital Group, L.P.,
     Its Managing Member


By: ____________________________  
       a _______________________  
         General Partner





                                   EXHIBIT S

                         Form of Tenant Estoppel Letter


                                                        Date: _________, 1998

        Re:  Lease, dated __________ , 19__, by and between _______________
             ______________________ ("Landlord") and _____________________ 
             ("Tenant") [as modified]* (the "Lease"), with respect to a 
             portion of the premises  commonly  known as 555 West 57th Street,
             New York, New York (the "Premises")



555 West 57th LLC
c/o Blackacre Capital Management, LLC
450 Park Avenue
New York, New York 10022

Ladies and Gentlemen:

         Tenant  understands  that  Blackacre  555 West 57th  Street MM LLC and
Blackacre  555 West 57th  Street  LLC,  the  members  of 555 West  57th LLC,  a
co-owner of the Premises, intends to sell and assign their membership interests
in such co-owner (the purchaser thereof being herein referred as "Purchaser").

         Tenant hereby acknowledges and agrees as follows:

         1. The Lease has not been further amended, modified or extended.

         2. The Lease does not contain any options to purchase and/or rights of
first refusal to purchase or any similar  provisions  regarding  acquisition of
ownership interests in the Premises, except as follows:

- ------------------------------------------------------------------------------
- ------------------------------------------------------------------------------

         3.  The  term of the  Lease  commenced  on  ________________  and will
terminate  on  ________________________. Tenant has no right to  terminate or
cancel the Lease, except as follows

- ------------------------------------------------------------------------------
- --------------------------------------------------------------------------.


- -----------------------
*List all modifications


         4.  The   current   monthly   [Rent]   payment   under  the  Lease  is
$______________  and the current  monthly  [Additional  Rent] payment under the
Lease is $_______________  (as each of such capitalized terms is defined in the
Lease). Rent has been paid through _____________, l99__ and Additional Rent has
been paid through _________, 199__. No advance Rent or Additional Rent has been
prepaid except for the current month.

         5. The improvements described in the Lease required to be performed by
Landlord have been completed and accepted by Tenant.

         6.  There has not been  granted  under the  Lease any  unexpired  free
rental, concession or abatement, except as follows:

         7.  Tenant  has not  sublet any  portion  of the  leased  premises  or
assigned any of its rights under the Lease, except as follows:

- ----------------------------------------------------------------------.

         8. The  Lease is in full  force and  effect.  Tenant  has no  existing
claims,  defenses  or  offsets  under the Lease  against  Landlord,  no uncured
default exists under the Lease, and no event has occurred which would, with the
giving of notice,  the lapse of time,  or both,  constitute a default under the
Lease.

         9. Except as set forth in Paragraph 3, no cancellation,  modification,
amendment,  extension  or  assignment  of  the  Lease,  and  no  subletting  or
prepayment  of more than one  month's  Rent or  Additional  Rent  shall be made
without Landlord's prior written consent.

         10. The security deposit held by Landlord under the Lease is $_____.

         11. The guaranty of the Lease, if any, is in full force and effect.

         12. There are no actions,  voluntary or involuntary,  pending against
Tenant under the bankruptcy laws of the United States or any State thereof.

         13.  Inquiries  concerning this letter should be directed to Tenant at
the following telephone number:
                                ---------------------.

         The statements  contained herein are made for the purposes of inducing
Purchaser to consummate  the  transactions  above-described,  and may be relied
upon for such purpose by




Purchaser and Greenwich Capital Mortgage Products,  Inc., the current mortgagee
of the Premises, and their respective successors and assigns.

                                      Very truly yours,

                                      [                                   ]

                                      By: _________________________________
                                          Name:
                                          Title:








                                   EXHIBIT T

                    Form of Amendment to Operating Agreement


                                  AMENDMENT TO
                          AMENDED AND RESTATED LIMITED
                          LIABILITY COMPANY AGREEMENT
                              OF 555 WEST 57TH LLC


          THIS  AMENDMENT TO AMENDED AND  RESTATED  LIMITED  LIABILITY  COMPANY
AGREEMENT  OF 555 WEST  57TH LLC (the  "Amendment"),  dated as of  ___________,
199__, by and among  BLACKACRE 555 WEST 57TH STREET MM LLC, a Delaware  limited
liability company  ("Blackacre MM LLC"),  BLACKACRE 555 WEST 57TH STREET LLC, a
Delaware limited liability company ("Blackacre LLC"), _____________________,  a
_________________ (the "Substitute Managing Member"), _____________________,  a
_________________ (the "Substitute Non-Managing Member"), and MARK A. FERRUCCI,
an employee of The  Corporation  Trust  Company,  a Delaware  corporation  (the
"Independent Member").

                             Preliminary Statement

          1. 555 West 57th LLC (the "Company") was formed as a Delaware limited
liability  company  pursuant to (a) a Certificate  of Formation of the Company,
dated as of August 19, 1997, and filed with the Secretary of State of the State
of Delaware on August 20, 1997, and (b) a limited  liability  company agreement
of the  Company,  dated as of  August  20,  1997  (the  "Original  Agreement"),
executed by the then sole member of the Company,  Capital  Trust,  a California
business Trust ("CT").

          2. CT  subsequently  assigned  its entire  interest in the Company to
Blackacre MM LLC and Blackacre LLC pursuant to an assignment agreement dated as
of October 30, 1997.

          3. Blackacre MM LLC, Blackacre LLC and the Independent Member entered
into that certain Amended and Restated Limited  Liability  Company Agreement of
the Company, dated October 30, 1997 (the "Operating Agreement"),  which amended
and restated the Original Agreement in its entirety.

          4.  Blackacre  MM LLC  desires to assign its entire  interest  in the
Company (the "Managing Member Interest") to the Substitute Managing Member, and
Blackacre  LLC  desires to assign  its  entire  interest  in the  Company  (the
"Non-Managing Member Interest") to the Substitute  Non-Managing Member, and the
Managing  Member  (as such term is  defined  in the  Operating  Agreement)  has
consented to such  assignments  in  accordance  with the terms of the Operating
Agreement.

          5. The  Substitute  Managing  Member  desires to acquire the Managing
Member  Interest and to be admitted as the  managing  member of the Company and
has  agreed  to be bound by all of the terms and  conditions  of the  Operating
Agreement.

          6.  The  Substitute   Non-Managing  Member  desires  to  acquire  the
Non-Managing  Member Interest and to be admitted as a member of the Company and
has  agreed  to be bound by all of the terms and  conditions  of the  Operating
Agreement.

          7. The parties  hereto  desire to amend the  Operating  Agreement  to
reflect the  withdrawal of Blackacre MM LLC and Blackacre LLC as members of the
Company and the  admission of the  Substitute  Managing  Member and  Substitute
Non-Managing Member as members of the Company.

          NOW,  THEREFORE,  in  consideration  of the  premises  and the mutual
agreements herein contained and for other good and valuable consideration,  the
receipt and  sufficiency  of which is hereby  acknowledged,  the parties hereto
hereby amend the Operating Agreement as follows:

          1. Each of Blackacre MM LLC and  Blackacre  LLC hereby  withdraw from
the Company as a member thereof, effective as of the date hereof.

          2. The Substitute  Managing  Member is hereby admitted as a member of
the  Company  as of the date  hereof in the place of  Blackacre  MM LLC and the
Substitute  Managing  Member  hereby  agrees  to be bound by all the  terms and
conditions  of the  Operating  Agreement  from and after the date  hereof.  All
references to the "Managing Member" in the Operating  Agreement shall hereafter
refer to the Substitute Managing Member and the definition of "Managing Member"
contained in Section 1.1 of the  Operating  Agreement is hereby  deleted in its
entirety and the following is substituted in lieu thereof:

               ""Managing Member" means  ___________________________,
               a  _________________,  or if such  entity  resigns  or
               withdraws as a Member or is  dissolved or  liquidated,
               then the  Independent  Member  shall  be the  Managing
               Member."

          3. The Substitute  Non-Managing Member is hereby admitted as a member
of the  Company  as of the date  hereof in the place of  Blackacre  LLC and the
Substitute  Non-Managing  Member hereby agrees to be bound by all the terms and
conditions  of the  Operating  Agreement  from and after the date  hereof.  All
references  to the  "Non-Managing  Member"  in the  Operating  Agreement  shall
hereafter  refer to the  Substitute  Non-Managing  Member and the definition of
"Non-Managing  Member"  contained in Section 1.1 of the Operating  Agreement is
hereby  deleted  in its  entirety  and the  following  is  substituted  in lieu
thereof:

              ""Non-Managing Member" means ______________________, 
              a _________________."

          4.  The  address  for  notices  to the  Company  (including,  without
limitation, the address for copies of notices) contained in Section 11.1 of the
Operating Agreement is hereby deleted in its entirety and the following address
is substituted in lieu thereof:

                                    "---------------------------
                                     ---------------------------

                                    with a copy to:

                                     ----------------------------
                                     ----------------------------
                                     ----------------------------"

          5. Schedule I attached to the Operating  Agreement is hereby  deleted
in its entirety  and the  Schedule I attached  hereto and made a part hereof is
substituted in lieu thereof.

          6. In all other respects, the Operating Agreement is hereby ratified,
confirmed and approved and remains in full force and effect.

          7. This  Amendment may be executed in several  counterparts,  each of
which shall  constitute  but one agreement  for all  purposes,  binding on each
party hereto.






          IN WITNESS  WHEREOF,  the undersigned have executed this Amendment as
of the day and year first above written.

                                   BLACKACRE 555 WEST 57TH
                                      STREET MM LLC

                                   By:   Blackacre Capital Group, L.P.,
                                         Its Managing Member


                                   By: ________________________________
                                       a_______________________________
                                       General Partner


                                   BLACKACRE 555 WEST 57TH
                                      STREET LLC

                                   By:   Blackacre Capital Group, L.P.,
                                         Its Managing Member


                                   By:  ___________________________________
                                        a _________________________________
                                          General Partner


                                   [SL GREEN OPERATING PARTNERSHIP, L.P.,
                                   a Delaware limited partnership]


                                   By:  ____________________________________,
                                        a ________________________,
                                        General Partner


                                   [SL GREEN OPERATING PARTNERSHIP, L.P.,
                                   a Delaware limited partnership]


                                   By:  ___________________________________,
                                        a ________________________,
                                        General Partner


                                   -------------------------------------
                                   Mark A. Ferrucci
                                   Assistant Vice President of The Corporation
                                   Trust Company






                                   SCHEDULE I



                                           Capital             Percentage
Name and Address of Member              Contribution           Interest  


_________________________________       $__________            [99.00%]
_________________________________
_________________________________

_________________________________      $__________             [1.00%]
_________________________________
_________________________________

Mark A. Ferrucci, an employee of 
  The Corporation Trust Company        $  -0-                   0.00%
1209 Orange Street
Wilmington, Delaware  19801






                                   SCHEDULE 1

                          Balance Sheet of the Company







                                   SCHEDULE 2

                        Balance Sheet of Associates LLC











                     AMENDMENT TO SALE-PURCHASE AGREEMENT

          THIS AMENDMENT TO SALE-PURCHASE  AGREEMENT (the "AMENDMENT"),  dated
as of January __, 1999, by and among  BLACKACRE 555 WEST 57TH STREET MM LLC, a
Delaware limited  liability  company,  having an office c/o Blackacre  Capital
Management,  LLC, 450 Park Avenue,  New York,  New York 10022  ("BLACKACRE  MM
LLC") and  BLACKACRE  555 WEST 57TH STREET LLC, a Delaware  limited  liability
company,  having an office c/o  Blackacre  Capital  Management,  LLC, 450 Park
Avenue, New York, New York 10022 ("BLACKACRE LLC" and, together with Blackacre
MM LLC, individually,  a "SELLER" and, collectively,  "SELLERS"), and SL GREEN
OPERATING PARTNERSHIP, L.P., a Delaware limited partnership,  having an office
at 70 West 36th Street, New York, New York 10018-8007 ("PURCHASER").

                             W I T N E S S E T H:

          WHEREAS,   Sellers  and   Purchaser   entered   into  that   certain
Sale-Purchase  Agreement,  dated as of October  22,  1998,  as amended by that
certain letter agreement, of even date therewith,  among Sellers and Purchaser
(as so amended, the "AGREEMENT"); and

          WHEREAS,  Purchaser has identified certain costs which Purchaser may
be required to incur in connection with the facade of the building  located on
the Property (as defined in the  Agreement)  in order to cause the Property to
comply with applicable law; and

          WHEREAS,  Sellers and  Purchaser  have agreed to reduce the Purchase
Price (as defined in the  Agreement)  and desire to amend the Agreement in the
respects hereinafter set forth.

          NOW, THEREFORE, for Ten Dollars ($10.00) and other good and valuable
consideration,  the receipt and sufficiency of which is hereby acknowledged by
Sellers  and  Purchaser,  and in  consideration  of the mutual  covenants  and
agreements herein set forth, the parties hereto hereby agree as follows:

          1.  Sections  3.1 and 3.2.2 of the  Agreement  is hereby  amended to
delete the reference to "$37,525,000" and to insert "$35,525,000" in the place
thereof.

          2. Section  8.1(a) of the Agreement is hereby  amended to delete the
phrase  "11:59  PM on the day  preceding  the date of  Closing"  and to insert
"11:59 PM on December 31, 1998" in the place thereof.

          3. Except as amended by this Amendment,  in all other respects,  the
Agreement is hereby ratified, confirmed and approved and remains in full force
and effect.

          4. This Amendment may be executed in several  counterparts,  each of
which shall  constitute  but one agreement  for all purposes,  binding on each
party hereto.



                           [SIGNATURE PAGE FOLLOWS]



          IN WITNESS WHEREOF,  the undersigned have executed this Amendment as
of the day and year first above written.

                                  SELLERS:

                                  BLACKACRE 555 WEST 57TH STREET MM
                                  LLC,
                                   a Delaware limited liability company

                                  By:  Blackacre Capital Group, L.P.,
                                        a Delaware limited partnership
                                        Managing Member

                                       By:  Blackacre Capital Management Corp.,
                                             a Connecticut corporation,
                                             General Partner


                                             By: 
                                             ----------------------------------
                                                 Name:   Jeffrey B. Citrin
                                                 Title:  President

                                  BLACKACRE 555 WEST 57TH STREET LLC,
                                   a Delaware limited liability company

                                  By:  Blackacre Capital Group, L.P.,
                                        a Delaware limited partnership,
                                        Managing Member

                                       By:  Blackacre Capital Management Corp.,
                                             a Connecticut corporation,
                                             General Partner


                                             By: 
                                             ----------------------------------
                                                  Name:   Jeffrey B. Citrin
                                                  Title:  President

                    [SIGNATURES CONTINUE ON FOLLOWING PAGE]

                                  PURCHASER:

                                  SL GREEN OPERATING PARTNERSHIP, L.P.,
                                   a Delaware limited partnership

                                  By:  SL Green Realty Corp.,
                                        a Maryland corporation,
                                        General Partner


                                       By:                                 
                                          -------------------------------------
                                          Name:   Marc Holliday
                                          Title:  Chief Investment Officer









               ASSIGNMENT AND ASSUMPTION OF MEMBERSHIP INTEREST

          ASSIGNMENT AND ASSUMPTION OF MEMBERSHIP INTEREST (the "Assignment"),
dated as of January ___, 1999,  between  BLACKACRE 555 WEST 57TH STREET LLC, a
Delaware limited  liability  company,  having an office c/o Blackacre  Capital
Group, L.P., 450 Park Avenue, New York, New York 10022 ("Assignor"), and GREEN
W. 57TH ST., LLC, a New York limited liability  company,  having an office c/o
SL Green Realty  Corp.,  70 West 36th Street,  New York,  New York  10018-8007
("Assignee").

                             W I T N E S S E T H:

          WHEREAS,  Assignor  is a member  of 555 West 57th  LLC,  a  Delaware
limited  liability company (the "Company") formed pursuant to that certain (a)
Certificate  of  Formation of 555 West 57th LLC,  dated  August 19, 1997,  and
filed in the  Office of the  Secretary  of State of the State of  Delaware  on
August 20,  1997,  and (b)  Amended and  Restated  Limited  Liability  Company
Agreement of 555 West 57th LLC,  dated as of October 30, 1997 (the  "Operating
Agreement"); and

          WHEREAS,  Assignor currently owns a 99% membership  interest in, and
is a non-managing member of, the Company (the "Interest"); and

          WHEREAS,  Assignor  wishes to assign the Interest to  Assignee,  and
Assignee desires to accept the assignment of the Interest; and

          WHEREAS,  the  Company  and the other  members of the  Company  have
agreed to consent to the assignment of the Interest to Assignee.

          NOW, THEREFORE, for Ten Dollars ($10.00) and other good and valuable
consideration,  the receipt and sufficiency of which is hereby acknowledged by
Assignee and Assignor, the parties hereto hereby agree as follows:

          1. Assignor hereby assigns, sells, transfers and conveys to Assignee
the Interest,  including,  without limitation,  all of Assignor's right, title
and interest in and to all profits,  losses,  distributions and capital of the
Company and all of Assignor's rights to be and act as a non-managing member of
the  Company,  and any and all other  rights of Assignor  under the  Operating
Agreement  or  otherwise  as a member of the  Company in  connection  with the
assets of the Company.

          2.  Assignor  hereby  withdraws  from the Company as a member of the
Company. From and after the date hereof, Assignor shall have no further right,
title or interest  in the Company or any of the assets  thereof and shall have
no further rights, liabilities or obligations under the Operating Agreement or
otherwise  in  connection  with the  Company or the assets  thereof.  Assignor
hereby expresses its intention that Assignee shall become a substitute  member
in its place.

          3.  Assignee  hereby  accepts the  assignment  hereunder  and hereby
agrees to be bound by each and every  provision of the Operating  Agreement in
respect  of the  Interest  from and  after the date  hereof  and  assumes  all
obligations under the Operating  Agreement in respect of the Interest accruing
from and after the date hereof.

          4. By its execution and delivery of this Assignment  where indicated
below, the managing member of the Company hereby consents to the assignment of
the  Interest,  the  withdrawal of Assignor as a member of the Company and the
admission of Assignee as a member of the Company.

          5. Each party hereby agrees to execute such further documents as may
be required or desirable by the other party in order to effectuate or evidence
the assignment  set forth herein,  the withdrawal of Assignor from the Company
and the admission of Assignee as a member of the Company,  including,  without
limitation, an amendment to the Operating Agreement.

          6. This Assignment may be executed in several counterparts,  each of
which shall for all purposes  constitute  but one  agreement,  binding on each
party hereto.

          7. This  Assignment  shall be construed  and enforced in  accordance
with the laws of the State of New York.

          [NO FURTHER TEXT ON THIS PAGE]



          IN WITNESS WHEREOF, the undersigned have executed this Assignment as
of the day and year first above written.

                               ASSIGNOR:

                               BLACKACRE 555 WEST 57TH STREET LLC,
                                a Delaware limited liability company

                                By:  Blackacre Capital Group, L.P.,
                                      a Delaware limited partnership,
                                      Managing Member

                                      By:  Blackacre Capital Management Corp.,
                                            a Connecticut corporation,
                                            General Partner


                                            By:                               
                                               -------------------------------
                                               Name:   Jeffrey B. Citrin
                                               Title:  President

                               ASSIGNEE:

                               GREEN W. 57TH ST., LLC,
                                 a New York limited liability company

                                 By:  SL Green Operating Partnership, L.P.,
                                       a Delaware limited partnership,
                                       Managing Member

                                       By:  SL Green Realty Corp.,
                                             a Maryland corporation,
                                             General Partner


                                             By:                              
                                                ------------------------------
                                                Name:   Marc Holliday
                                                Title:  Chief Investment Officer

                      [SIGNATURES CONTINUED ON NEXT PAGE]



AGREED AND CONSENTED TO
THIS ____ DAY OF JANUARY, 1999

BLACKACRE 555 WEST 57TH
  STREET MM LLC, Managing Member

By:  Blackacre Capital Group, L.P.,
       Managing Member

By:  Blackacre Capital Management Corp.,
       a Connecticut corporation,
       General Partner


       By:
          ------------------------------
          Name:   Jeffrey B. Citrin
          Title:  President













                           ASSIGNMENT AND ASSUMPTION
                                      OF
                            SALE-PURCHASE AGREEMENT

     KNOW  THAT SL GREEN  OPERATING  PARTNERSHIP,  L.P.,  a  Delaware  limited
partnership  ("Assignor")  having an office at c/o SL Green Realty  Corp.,  70
West 36th Street,  New York, New York 10018, in  consideration  of Ten Dollars
($10.00)  and  other  good  and  valuable   consideration,   the  receipt  and
sufficiency of which is hereby  acknowledged,  hereby assigns to Green w. 57th
ST., LLC, a New York limited liability company  ("Assignee")  having an office
at c/o SL Green Realty Corp.,  70 West 36th Street,  New York, New York 10018,
all of  Assignor's  right,  title and  interest  in, to and under that certain
Sale-Purchase  Agreement  (the  "Agreement")  dated as of  October  22,  1998,
between  Assignor and  Blackacre 555 West 57th Street MM LLC and Blackacre 555
West 57th Street LLC (collectively,  "Sellers"), as amended, together with the
Downpayment,  Additional Cash Downpayment and Additional Downpayment Letter of
Credit (as each such term is defined in the  Agreement)  delivered by Assignor
to Seller thereunder.

     TO HAVE AND TO HOLD to Assignee and its successors  and its assigns,  who
shall  hereafter  be deemed to be  substituted  for  Assignor,  subject to the
covenants, conditions and provisions of the Agreement; provided, however, that
Assignor shall not be released hereby from its obligations under the Agreement
and shall remain bound by such  obligations  in accordance  with the terms and
provisions of the Agreement.

     AND ASSIGNEE  does hereby  agree to assume,  be bound by, and subject to,
all of the terms, covenants and conditions of the Agreement; provided however,
that  Assignor  shall not be released  hereby from its  obligations  under the
Agreement and shall remain bound by such  obligations  in accordance  with the
terms and provisions of the Agreement.



     IN WITNESS  WHEREOF,  Assignor and Assignee have executed this Assignment
and Assumption of Sale-Purchase Agreement as of January __, 1999.

                                  ASSIGNOR:

                                  SL Green Operating Partnership, L.P.

                                  By:  SL Green Realty Corp., a Maryland
                                       corporation, its general partner


                                       By:                                 
                                          ------------------------------------
                                          Name:   Marc Holliday
                                          Title:  Chief Investment Officer

                                  ASSIGNEE:

                                  Green W. 57th ST., LLC

                                  By:  SL Green Operating Partnership, L.P.

                                       By:  SL Green Realty Corp., a Maryland
                                            corporation, its general partner


                                            By:                               
                                               -------------------------------
                                               Name:   Marc Holliday
                                               Title:  Chief Investment Officer