Reactions of recoiling silicon atoms with phosphine and butadiene, and the addition of silylene to butadiene

Abstract
Silicon atoms recoiling from the 31P(n.p)31Si nuclear transformation in gaseous mixtures of phosphine and buta-1,3-diene give a low yield of[31Si]-1-silacyclopent-3-ene and a 31SiC4H6 compound believed to be [31Si]-1-silacylopenta-2,4-diene; the formation of some silylene from phosphine is indicated, and silylene is found to add in high yield to butadiene.

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