Synthesis and characterization of large stereoregular organosiloxane cycles

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• 作者：O. I. Shchegolikhina ; V. A. Igonin ; Yu. A. Molodtsova ; Yu. A. Pozdniakova ; A. A. Zhdanov ; T. V. Strelkova ; S. V. Lindeman
• 刊名：Journal of Organometallic Chemistry
• 出版年：1998
• 出版时间：20 July 1998
• 年：1998
• 卷：562
• 期：2
• 页码：141-151
• 全文大小：217 K

文摘

The large stereoregular phenyltrimethylsiloxysiloxane macrocycles of general formula [PhSi(OSiMe₃)O]_n (n=6 and 12) have been selectively obtained with high yields by trimethylsilylation of cage-like oligophenylmetallasiloxanes (OPMS) which we described earlier. The compounds 3 (n=6) and 4 (n=12) have been characterized by NMR-spectroscopy method and by single crystal X-ray analysis. This investigation showed unambiguously that the siloxane macrocycles keep their size and configuration (the same as in the initial OPMS) during the trimethylsilylation. Thus a synthetic route for obtaining large stereoregular siloxane macrocycles has been developed.