New catalysts for hydrosilylation of acetylenic compounds

Abstract

The regio- and stereo-selectivity in the homogeneous hydrosilylation of acetylene and heptene-1 monosubstituents and carbofunctional ethylene derivatives in the presence of palladium and platinum catalysts of a new type - [Pd 2(Ph 3P) 4Cl 2]B 10Cl 10 (I), [Pd 2(Ph 3P) 4Cl 2]B 12Cl 12 (II), [Pd(Ph 3P) 3Cl] 2B 10Cl 10 (III), [Pd(Ph 3P) 3Cl] 2B 12Cl 12 (IV), [Pt(Ph 3P) 3Cl] 2B 10Cl 10 (V), [Pt(Ph 3P) 3Cl] 2B 12Cl 12 (VI) - have been studied. Unlike H 2PtCl 6 and other commonly used catalysts, their application for hydrosilylation of acetylenic compounds makes the process regiospecific, leading to formation of β-adduct exclusively. These complexes also catalyze the addition of triethylsilane to allylamine.