Abstract
The CO 2 laser photosensitized (SF 6) decomposition of 1,1-diethynyl-1-silacyclobutane in the gas-phase involves a clean elimination of ethene to give a transient highly unsaturated diethynylsilene, which undergoes very efficient polymerization to yield saturated macromolecules with a cross-linked structure. The results reveal the very large enhancement of the ease of triple CC bond polymerization for molecules containing proximal CC and SiCH 2 bonds.
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