ISSN:
0268-2605
Keywords:
X-ray structure
;
osmium
;
acetylene ligand
;
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Os(CS)(PhC≡CPh)(PPh3)2 is formed by the treatment of Os(CS)(CO)(PPh3)3 with diphenylacetylene and is an example of a complex containing a four-electron donor acetylene ligand. Os(CS)(PhC≡CPh)(PPh3)2 crystallizes in the monoclinic space group P21/n with the cell dimensions a = 9.028(5), b = 25.256(2) and c = 19.22(2) Å with β = 103.8(7)°, V = 4260 Å3, Z = 4 and d(calcd) = 1.461 g cm-3 for mol.wt 937.09 g mol-1. Diffraction data were collected with a Nonius CAD-4 diffractometer and refined to R = 4.05% and Rw = 4.19% for 1172 independent reflections. The structure can be described as a distorted trigonal bipyramid with the CS ligand occupying an axial position. The two cis-PPh3 ligands are in equatorial sites with the acetylene occupying a position between the remaining axial and equatorial sites. The diphenylacetylene is symmetrically bound to the metal with an average Os—C distance of 2.04(3) Å. The Os—CS distance is unusually short at 1.79(2) Å.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aoc.590040515
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