1,1,3,3-TETRAMETHYL-4,5-BIS(TRIMETHYLSILYL)-1,3-DISILACYCLOPENT-4-ENE. PREPARATION BY THE FIRST METHYLENE INSERTION REACTION INTO A SILICON–SILICON BOND AND ANION RADICALS<sup>1)</sup>
The title compound was prepared by the reaction of 1,1,2,2-tetramethyl-3,4-bis(trimethylsilyl)-1,2-disilacyclobutene with photochemically generated methylene. Anionradicals of the title compound showed temperature dependence due to ring flipping.