The unusual dimerization of 1-mesityl-2,3,4-tri-t-butyl-1-silacyclobutadiene: a solid state structure
Abstract
The dimerization of 1-mesityl-2,3,4-tri-t-butyl-1-silacyclobutadiene proceeds through an initial [1,5] sigmatropic shift to give a long-lived o-silaxylylene which subsequently undergoes Diels–Alder addition to the silicon–carbon double bond of a remaining silacyclobutadiene.