acetonitrile, MeOH) has been studied. The solvatochromic effects observed for a number of imines, first of all, for 7-hydroxy-4-methyl-8-(4′-nitrophenylimino)methyl-2H-1-benzopyran-2-one, were related to their E/Z-isomerization with respect to the C=N bond based on the quantum chemical calculations by the AM1, PM3, PPP CI methods.
已经合成了芳香族
亚胺,即 5-formyl-6-hydroxy-4-methyl- 和 8-formyl-7-hydroxy-4-methylcoumarin 衍
生物。已经研究了它们的光谱特性(1H NMR 光谱、电子吸收光谱)对溶剂(
DMSO、
CHCl3、
DMF、
乙腈、MeOH)的依赖性。对许多
亚胺观察到的溶剂致变色效应,首先是 7-羟基-4-甲基-8-(4'-
硝基苯基亚
氨基)甲基-2H-1-苯并
吡喃-2-one,与它们的 E/Z - 基于
AM1、PM3、PPP CI 方法的量子
化学计算,关于 C=N 键的异构化。