Studies of the circular dichroism spectra of dissymmetric Schiff-bases by means of the exciton chirality method

被引：7

作者：

Spodine, E ^{[1
]}

Zolezzi, S ^{[1
]}

Calvo, V ^{[1
]}

Decinti, A ^{[1
]}

机构：

[1] Univ Chile, Fac Ciencias Quim & Farmaceut, Santiago, Chile

来源：

TETRAHEDRON-ASYMMETRY | 2000年 / 11卷 / 11期

关键词：

D O I：

10.1016/S0957-4166(00)00180-4

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The circular dichroism spectra of some dissymmetrical Schiff-bases derived from condensation of 2 mol salicylaldehyde with 1 mol of a chiral diamine are analyzed in terms of a simple conformational model taking the angle between the aromatic chromophores as a variable. The rotatory strengths of the pi-->pi* transitions are calculated with AM1 molecular orbitals in combination with the dipole-coupling approximation.. Calculated CD curves are found to be in reasonable agreement with the experimental CD spectra. Differences in the CD spectra of the Schiff-bases are discussed in relation to variation of the theoretical CD curve of ethylenebis(salicylideneimine) as a function of conformation. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：2277 / 2288

页数：12

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