Kinetic studies of the gas-phase isomerisation of two trimethylsilyl substituted cyclopropenes reveal a novel 1,4 Me3Si-shfit and a rate enhancement of ca. 1200 corresponding to a 1,2 Me3Si-shift, both explicable in terms of β-stabilisation of the biradical intermediate.
R. Walsh, C. Wolf, S. Untiedt and A. de Meijere, J. Chem. Soc., Chem. Commun., 1992, 422 DOI: 10.1039/C39920000422
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