137963-74-7Relevant articles and documents
Competitive dehydrogenative silylation and hydrogenative dimerization of vinyltriethoxysilane catalyzed by the [Ni(acac)2] + PPh3 system, intermediate and mechanistic implications
Marciniec,Maciejewski,Gulinski,Maciejewska,Duczmal
, p. 245 - 251 (1996)
[Ni(acac)C2H5(PPh3)] (C) has been shown to be an essential intermediate in the reaction between HSi(OC2H5)3 and vinyltrisubstituted silanes catalyzed by the system [Ni(acac)2] + PPh3 at room temperature, but only after oxygenation of the coordinated triphenylphosphine. The stoichiometric and catalytic reactions of complex C with the substrates lead to catalysed, competitive dehydrogenative silylation and hydrogenative dimerization of vinylsilane, which occur following insertion of the latter into Ni-H, Ni-Si ≡ and Ni-C bonds.
Catalysis of hydrosilylation XXIII. Effect of substituents at silicon on unusual hydrosilylation of vinylsilanes catalysed by nickel acetylacetonate
Marciniec, Bogdan,Maciejewski, Hieronim
, p. 45 - 50 (1993)
Nickel acetylacetonate catalyses a competitive-consecutive reaction of trisubstituted silanes ((EtO)3SiH and Et3SiH) with a variety of vinyl-trisubstituted silanes, giving products of dehydrogenative silylation, hydrosilylation and hydrogenative oligimerization as well as of disproportionation of substrates and dehydrogenative silylation of bis(silyl)ethenes.The conversion, yield and selectivities of the reaction have been influenced by many factors such as electronic and steric effects of the substituents at silicon of both initial substrates, as well as by the vinyl:hydrosilane ratio, the temperature and the presence of dioxygen.
