Analysis of Terminal Group and Stereochemistry of Silicon-Containing Compounds and Polymers by NMR

Abstract 1H, 13C and 29Si NMR spectroscopy was used to study the terminal structures, stereoregularity, and optical activity of silicon-containing polymers. In the ring-opening polymerization of 1,1,2-trimethylsilacyclobutane using a platinum catalyst, extensive chain transfer reactions occurred. The five-membered cyclic carbosiloxane could be easily polymerized by phenyllithium to give a high-molecular-weight polymer through regioselective ring-opening. Polymerization of optically active allylsilane, vinylsiloxane, and cyclic carbosiloxane gave highly isotactic poly(carbosilane) and poly(carbosiloxane).

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