Treating octasilanol [Si8O12][OH]8 with tetramethoxysilane and trimethoxyvinylsilane: a halogen-free synthetic route to alkoxysilyl-substituted double-four-ring siloxanes

Abstract

The synthesis of methoxysilyl-substituted siloxanes with a double-four-ring (D4R) framework [Si₈O₁₂][OSiR(OMe)₂]₈ (R = OMe or vinyl) via the dealcoholative coupling between silanol [Si₈O₁₂][OH]₈ and alkoxysilane was accomplished and achieved a halogen-free synthetic process. The solid-state structure of [Si₈O₁₂][OSi(OMe)₃]₈ was determined via a single-crystal X-ray diffraction analysis.