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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Octa, deca, and dodeca(4-nitrophenyl) cage silsesquioxanes via 4-trimethylsilylphenyl derivatives
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Octa, deca, and dodeca(4-nitrophenyl) cage silsesquioxanes via 4-trimethylsilylphenyl derivatives

机译:通过4-三甲基甲硅烷基苯基衍生物的八,十和十二(4-硝基苯基)笼型倍半硅氧烷

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摘要

Pure octa, deca, and dodeca(4-nitrophenyl) cage silsesquioxanes were obtained by regio-selective 4-nitration of octa, deca, and dodeca(4-trimethylsilylphenyl) cage silsesquioxanes via ipso-substitution of trimethylsilyl-phenyl bonds by fuming nitric acid. 3-Nitration of octa(4-methylphenyl)- octasilesquioxane was also described. The starting octa(4-methyl-, 4-isopropyl- and 4-trimethylsilylphenyl)octasilsesquioxanes were selectively formed in 9-21% isolated yield in the presence of hydrochloric acid. Mixtures of octa, deca and dodecasilsesquioxanes, with decasilsesquioxane as the main component, were formed in the presence of tetrabutylammmonium fluoride as a catalyst. All the cage compounds could be separated mainly by crystallization.
机译:通过发烟硝酸通过三甲基甲硅烷基-苯基键的ipso取代,对八,癸和十二碳(4-三甲基甲硅烷基苯基)笼型倍半硅氧烷进行区域选择性的4硝化反应,获得了纯八,十癸和十二碳(4-硝基苯基)笼型倍半硅氧烷。 。还描述了八(4-甲基苯基)-八碳倍半氧烷的3-硝化。在盐酸存在下,以9-21%的分离收率选择性地形成起始八(4-甲基-,4-异丙基-和4-三甲基甲硅烷基苯基)八聚倍半硅氧烷。在以四丁基氟化铵为催化剂的情况下,以癸二倍半硅氧烷为主要成分,形成了八溴,十氢化萘和十二烷倍半硅氧烷的混合物。所有的笼状化合物可以主要通过结晶分离。

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