Catalysis of hydrosilylation XXIII. Effect of substituents at silicon on unusual hydrosilylation of vinylsilanes catalysed by nickel acetylacetonate

Article abstract of DOI:10.1016/0022-328X(93)83221-G

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.