作者:Prabhat Arya、Robert J.P. Corriu、Krishna Gupta、Gérard F. Lanneau、Zhifang Yu
DOI:10.1016/0022-328x(90)80080-j
日期:1990.12
Pentacoordinated silicon compounds. Intramolecular ring closure, site preferences of substituents and the stability of the resulting chelates
作者:Robert J.P. Corriu、Agapit Kpoton、Monique Poirier、Gérard Royo、Arnaud de Saxcé、J. Colin Young
DOI:10.1016/0022-328x(90)85258-z
日期:1990.9
s and 2-[1-(dimethylamino)ethyl]phenylsilanes with a wide range of substituents on the silicon atom. Temperature-dependent 19F spectra of compounds of the type Me2NCH2C6H4SiMeFX in which the geometry about the silicon atom is trigonalbipyramidal with the donor nitrogen atom axial, have established the preference of the substituent X for the axial site trans to the donor nitrogen atom, relative to
已经对在硅原子上具有广泛取代基的2-(二甲基氨基甲基)苯基硅烷和2- [1-(二甲基氨基)乙基]苯基硅烷中的螯合进行了动态NMR研究。Me 2 NCH 2 C 6 H 4 SiMeFX类型化合物的温度相关19 F光谱,其中硅原子周围的几何形状为三角双锥体且施主氮原子为轴向,确定了取代基X对于轴向位点的偏好相对于氟原子而言,反式转化为供体氮原子。结合其他结构数据,得出嗜茶性系列:H <烷基<芳基