Katalytische hydrierung von halogenmonosilanen mit tributylzinnhydrid

Abstract

Bu 3SnH is an effective reagent for partial conversion of SiCl into SiH groups. The presented hydrogenation mechanism postulates the coordination of the catalyst (Lewis bases) or the solvent to silicon, giving an intermediate with higher coordinated silicon atom in the first step, followed by the attack of tributyltin hydride by a single electron transfer. This mechanism implies that the intermediate having a hypervalent silicon atom reacts more rapidly than the starting tetracoordinated silane.