RuCl 2 (PPh 3 ) 3 Catalyzed Hydrosilylation and Dimerization of Phenylacetylene in the Presence of Various Hydrosilanes

The title ruthenium complex was found to catalyze the hydrosilylation and/or dimerization of phenylacetylene in the presence of a variety of hydrosilanes. Chlorohydrosilanes (HSiMeCl₂, HSiMe₂Cl and HSiCl₃) favored the formation of the corresponding β-silylstyrenes while HSiEt₃ favored the formation of 1,4-diphenylbuteneyne; Z-isomers were the major product regardless of the substituents on silicon.