Si-trifluorosilyl substituted vinyl(ethynyl)silanes

Abstract A series of organyl(β-trifluorosilylvinyl)silanes different in degree of addition were obtained by hydrosilylation of dimethyldiethynyl-, methyltriethynyl- and tetraethynyl- silanes with trichlorosilane in the presence of H 2 PtCl 6 followed by treatment of the adducts formed with 40% hydrofluoric acid. The degree of addition is dependent on the molar ration of reagents. Thus, the reaction of tetraethynylsilane with two moles of trichlorosilane followed by treatment with HF affords triethynyl(β-trifluorosilylvinyl)silane and diethynyl-bis(β- trifluorosilylvinyl)silane. The compounds formed are readily involved in the reaction organometallic compounds at the SiF bond. For example,