Isomerization of an isolable silylene into a silene via 1,2-silyl migration

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A kinetic study of the thermal irreversible isomerization of an isolable dialkylsilylene into the corresponding cyclic silene revealed that the activation enthalpy (ΔH) and entropy (ΔS ) are 18.49 ± 0.43 kcal mol-1 and -20.32 ± 1.35 cal mol-1 K-1, respectively. The relatively low ΔH and negative ΔS values are in accord with the concerted 1,2-silyl migration via a cyclic transition state as previously proposed. The cyclic silene in benzene-d6 isomerized photochemically into the corresponding alkenylsilane via 1,3-hydrogen shift.

Original languageEnglish
Pages (from-to)919-921
Number of pages3
Issue number3
Publication statusPublished - 2009 Feb 9


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