1H, 13C and 29Si NMR study of α- and β-silylstyrenes and their adducts with dichlorocarbene
作者:E. Liepiņs̆、Yu. Goldberg、I. Iovel、E. Lukevics
DOI:10.1016/s0022-328x(00)99405-1
日期:1987.12
1H, 13C and 29Si NMR spectra for the α- and β-silylstyrenes (E)-PhCHCHSiR3 (I) and PhC(SiR3)CH2 (II) (R = Cl, Me, Ph), and those for some dichlorocarbene adducts of I and II (R = Me, Ph), were examined. From the 13C NMR data, the phenyl substituent in the molecules I and II enhances the electronic effects of the organosilicon substituent at Cα, and weakens these effects on the Cα resonance. The degree
1个H,13 C和29的α-和β-silylstyrenes的Si NMR谱(ë)-PhCHCHSiR 3(I)和光子晶体(SIR 3)CH 2(II)(R =氯,甲基,PH) ,以及一些I和II的二氯卡宾加合物(R = Me,Ph)的化合物。从13个C NMR数据,在分子中的苯基取代基I和II在增强Cα有机硅取代基的电子效应,并削弱在C这些效果α共振。乙烯基CC键的极化程度随着SiR 3中取代基R的吸电子性能提高而增加。化合物I和II中的基团,并与该键对亲电子二氯卡宾的反应性降低有关。测量了分子I,II及其与:CCl 2的加合物中的几个远程偶联常数(CC)。估计的CC对研究有机硅化合物中的电子效应很有帮助。