Hydrosilylation of the CC triple bond by phenyl- and thienyl-silanes

The effects of the structures of the hydrosilane and the acetylene derivative, catalyst, temperature and solvent on the yields and ratio of isomers during the hydrosilylation of phenylacetylene, 2-(ethynyl)thiophene, 2-(propargyl)thiophene, methyl propiolate, propargyl alcohol and its methyl ether, and propargyl amines by phenyl- and thienyl-hydrosilanes have been studied. The yields of the reaction products upon hydrosilylation of HCCX compounds by dimethyl(2-thienyl)silane in the presence of chloroplatinic acid at 50°C decrease in the following sequence of substituents X: