Practical Synthesis and Polymerization of Trifluorovinylsilanes. A Possible Precursor of Poly(difluoroacetylene)

An improved procedure for the preparation of trifluorovinylsilanes was established which involved addition of butyllithium to a mixture of chlorosilanes and commercially readily available chlorotrifluoroethylene at −78 to −130 °C, and the resulting monomer was polymerized with a catalyst such as CsF or (R2N)3S+ F2SiMe3− to give black metallic polymer which showed conductivity of 10−9 to 10−10 Ω−1cm−1.