Silicon Acetal Metathesis Polymerization

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• 作者：Ertugrul Sahmetlioglu ; Ha Thi Hoang Nguyen ; Olivier Nsengiyumva ; Ersen Göktürk ; Stephen A. Miller
• 刊名：ACS Macro Letters
• 出版年：2016
• 出版时间：April 19, 2016
• 年：2016
• 卷：5
• 期：4
• 页码：466-470
• 全文大小：345K
• 年卷期：0
• ISSN：2161-1653

文摘

A kinetic study revealed that the acid-catalyzed (p-TSA) equilibration of Me₂Si(OMe)₂ and Me₂Si(OEt)₂, forming Me₂Si(OEt)OMe, is established in 300 min in benzene at room temperature. This silicon acetal metathesis reaction is exploited for the step-growth polymerization of bis-silicon acetals (MeOSiMe₂OROSiMe₂OMe) with metathetical loss of Me₂Si(OMe)₂. Thus, a convenient and generalized silicon acetal metathesis polymerization (SAMP) method is introduced as the acid-catalyzed copolymerization of a diol (HOROH) and Me₂Si(OMe)₂, driven by elimination of methanol and/or Me₂Si(OMe)₂. SAMP constitutes an effective and powerful strategy for manipulating the most common bond in the Earth’s crust, the silicon–oxygen bond.