Laboratoire de Chimie organique du Silicium et de l'Etain, Universitg de Bordeaux I, F-33405 Talence C6dex Marcel LEFORT Rh8ne-Poulenc Recherches, Centre de Recherche de Saint-Fons, BP 62, F 69190 Saint-Fons. ... ABSTRACT : The use of a nickel catalyst ("Ni/SiH") allows easy hydrogenation of alkenylchlorosilanes at atmospheric pressure, not affecting the chlorine function, and leads to quantitative synthesis of alkylchlorosilanes.