Octaisopropyloctasilsesquioxane, brominated octaisopropyloctasilsesquioxanes, and their reactions

Abstract

Some reactions of octaisopropylpentacyclo(9,5,1,1^3,9,1^5,15,1 ^7,18)octasiloxane (octaisopropyl-T₈) and its brominated derivatives have been investigated. The isolation of compounds (C₈H₆Br)_n(C₃H₇)_8-n(SiO_1.5)₈ (n = 1, 2, or 3) is reported. Dehydrobromination of α-brominated octaisopropyl-T₈ compounds yields isopropenyl-T₈ derivatives. Bromine addition to the latter occurs. The high resolution p.m.r. spectra of octaisopropyl-T₈ derivatives are discussed.