Bildung siliciumorganischer Verbindungen. XXXI. Synthese des Brme2Si?CH2?Sime2?CC?Sime2?CH2-Sime2Br und dessen Abbau mit HBr

The synthesis of C₆H₅me₂Si? CH₂? Sime₂? C?C? Sime₂? CH₂? Sime₂C₆H₅ (a) is described, which forms Brme₂Si? CH₂? Sime₂? C?C? Sime₂? CH₂-Sime₂Br(b) with HBr. The reaction of (b) with HBr (1–4 moles at ?78°C) yields Brme₂Si? CH₂? Sime₂Br, as well as 1,2-dibromo-ethane (main products) and Brme₂Si? CH₂/? Sime₂CH = CHBr, Brme₂Si? CH₂? Sime₂CH₂? CHBr₂.