Substituent effects on the stretching vibration of C═N in multi‐substituted benzylideneanilines
作者:Linyan Wang、Chaotun Cao、Chenzhong Cao
DOI:10.1002/poc.3969
日期:2019.9
synthesized, and their infrared absorption spectra were recorded in this paper. On the basis of the stretching vibration frequencies νC═N of C═N bridging bond of 158 samples of substituted XBAYs (including 57 samples of 4,4′‐disubstituted XBAYs from reference and 101 samples of substituted XBAYs synthesized in this paper), an extensional research of substituent effects on the νC═N values from 4,4′‐disubstituted
合成了39个3,4'/ 4,3'/ 3,3'-二取代的亚苄基苯胺(XBAYs)样品和52个多取代的XBAYs样品,并记录了它们的红外吸收光谱。根据158个取代的XBAY样品(包括参考文献中的57个4,4'-双取代的XBAY样品和101个合成的取代的XBAY样品)的C═N桥键的拉伸振动频率νC═N,进行了取代基对从4,4'-双取代XBAY到多取代XBAYs的νC═N值的扩展研究。用于量化νC═N的修正方程获得了多取代XBAY的值(如公式(3)所示)。公式(3)表明,对于多取代XBAYs的νC═N值进行定量回归分析,不能忽略Y的激发态取代基常数以及X和X之间的取代基特定的交叉相互作用效应。与等式(1)相比,等式(3)在量化替代XBAY的νC═N值方面具有更广泛的应用和更高的准确性。