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Controlled synthesis of poly(carbosiloxane)s

机译:聚碳硅氧烷的受控合成

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Dehydrocoupling polymerization of 1,4-bis(dimethylsilyl)benzene, l,3-bis(diniethylsilyl)benzene, 4,4'-bis(dimethylsilyl)benzene, and 9, 9'-bis[4-(dimethylsilyl)phenyl]fluorene with water was carried out. The sequential regularity of the polymers was estimated by 1{sup left}H-NMR spectroscopy. The reactivity of Si - H on the dimethylsilyl group in the dehydrocoupling reaction was found to be almost the same without any connection to the structure of the aromatic groups. Stereoregular and optically active polycarbosiloxanes were also synthesized by polyaddition, polycondensation, and ring-opening polymerization of optically-active monomers. Their regio- and stereoregularity were investigated by the 13{sup left}C and 29{sup left}Si-NMR, and proved to be dependent upon the optical purity of the monomers.
机译:1,4-双(二甲基甲硅烷基)苯,1,3-双(二乙基硅甲硅烷基)苯,4,4'-双(二甲基甲硅烷基)苯和9,9'-双[4-(二甲基甲硅烷基)苯基]芴的脱氢偶联聚合用水进行。聚合物的顺序规则性通过1 H-NMR谱估计。发现Si-H在脱氢偶联反应中对二甲基甲硅烷基的反应性几乎相同,而与芳族基团的结构没有任何关系。还通过光学活性单体的加聚,缩聚和开环聚合反应合成了立体球形和光学活性聚碳硅氧烷。通过13 C和29 Si-NMR研究了它们的区域和立构规整度,并证明其取决于单体的光学纯度。

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