摘要
笼形倍半硅氧烷是一类典型的多面体有机-无机分子复合物。^(29)Si NMR是测定这类含硅化合物结构的有效方法。利用^(29)Si NMR对6种笼形八聚倍半硅氧烷的结构进行了研究,结合所得数据探讨了这类化合物中取代基电负性对^(29)Si NMR化学位移的影响。根据~1H,^(13)CNMR数据及各峰归属可以进一步判断笼形倍半硅氧烷取代基R的类型和结构。
Cage-like silsesquioxane is a special type of polyhedral compound composed of both organic and inorganic molecules, whose structure can be determined effectively by ^(29)Si NMR. In this article, we studied the structures of six kinds of cage-like octa silsesquioxane by NMR. Combining experimental data and empirical treatment, it was found that the electronegativity of the subsistent on the cage has important influences on the silicon chemical shifts. The structures of the subsistent on cage-like silsesquioxane were determined by using ~1H and ^(13)C NMR.
出处
《波谱学杂志》
CAS
CSCD
北大核心
2004年第1期57-60,共4页
Chinese Journal of Magnetic Resonance
