Organometallics p. 1 - 2 (1992)
Update date:2022-07-31
Topics:
Adams, Richard D.
Cortopassi, Jeffrey E.
Pompeo, Michael P.
Reactions of the complex Os3(CO)10(NCMe)-[Si(OMe)3](μ-H) (1a) with the alkynes HC2R (R = But, p-tolyl) yield complexes that upon treatment with CO at 68°C produce the silylolefins trans-R(H)C=C(H)Si(OMe)3 (R = But, p-tolyl). One of the complexes, Os3(CO)10-[Si(OR)3][μ-C(H)C(H)Bu t] (2a; R = Me) was characterized crystallographically and found to contain a bridging η2-tert-butylvinyl ligand and a terminally coordinated trimethoxysilyl group positioned cis to the bridging carbon atom of the tert-butylvinyl group. The characterization of this intermediate demonstrates that the mechanism of hydrosilation by this cluster complex is initiated by a hydride insertion mechanism.
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