Journal of the Chemical Society, Dalton Transactions p. 2051 - 2058 (1982)
Update date:2022-08-11
Topics:
Farrar, David H.
Johnson, Brian F. G.
Lewis, Jack
Raithby, Paul R.
Rosales, Maria J.
The reaction of a=8.880(4), b=10.244(5), c=16.529(7) Angstroem, α=99.98(2), β=93.44(2), γ=110.37(3) deg, and Z=2.The structure was solved by a combination of direct methods and Fourier-difference techniques and refined by blocked-cascade least squares to R=0.040 for 2616 observed diffractometer data.The metal-atom skeleton consists of two triangles sharing a vertex.The Os atom common to both triangles is co-ordinated to three terminal cabonyl groups, and the other four metal atoms are each co-ordinated to four carbonyl groups, two in axial and two in equatorial sites.Comp;ex ( 1 ) reacts with ligands L=P(OMe)3 (a) or PEt3 ( b ) to prosuce complexes with the general formula a ), or PEt3 ( b ) to produce a=11.150(5), b=11.792(6), c=18.581(10) Angstroem, α=106.91(3), β=92.67(3), γ=109.45(3) deg, and Z=2.The molecular geometry resembles that of ( 1 ) except that three equatorial carbonyls on three different Os atoms have been replaced by phosphite groups.The relationsship between the structures of ( 1 ) and ( 4 ) is discussed briefly in terms of transformations of the metal cluster skeleton.These two compound represent the first case where two binary carbonyls with the smee number of metal atoms have different numbers of carbonyls bonded to them.
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