Adams, Richard D.; Cortopassi, Jeffrey E.; Aust, Jeffrey, Journal of the American Chemical Society, 1993, vol. 115, p. 8877 - 8878
作者:Adams, Richard D.、Cortopassi, Jeffrey E.、Aust, Jeffrey、Myrick, Michael
DOI:——
日期:——
Johnson, Brian F. G.; Lewis, Jack; Monari, Magda, Journal of the Chemical Society, Dalton Transactions
作者:Johnson, Brian F. G.、Lewis, Jack、Monari, Magda、Braga, Dario、Grepioni, Fabrizia、Gradella, Cecilia
DOI:——
日期:——
Hydrosilation of alkynes by an osmium cluster complex. The isolation and structural characterization of an intermediate
作者:Richard D. Adams、Jeffrey E. Cortopassi、Michael P. Pompeo
DOI:10.1021/om00037a001
日期:1992.1
Reactions of the complex Os3(CO)10(NCMe)-[Si(OMe)3](mu-H) (1a) with the alkynes HC2R (R = Bu(t), p-tolyl) yield complexes that upon treatment with CO at 68-degrees-C produce the silylolefins trans-R(H)C = C(H)Si(OMe)3 (R = Bu(t), p-tolyl). One of the complexes, Os3(CO)10-[Si(OR)3][mu-C(H)C(H)Bu(t)] (2a; R = Me) was characterized crystallographically and found to contain a bridging eta(2)-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.