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

Spodine, E.; ZOLEZZI, S; Calvo, V.; Decinti A.

Abstract

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.

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Título según WOS: Studies of the circular dichroism spectra of dissymmetric Schiff-bases by means of the exciton chirality method
Título según SCOPUS: Studies of the circular dichroism spectra of dissymmetric Schiff-bases by means of the exciton chirality method
Título de la Revista: TETRAHEDRON-ASYMMETRY
Volumen: 11
Número: 11
Editorial: PERGAMON-ELSEVIER SCIENCE LTD
Fecha de publicación: 2000
Página de inicio: 2277
Página final: 2288
Idioma: English
URL: http://linkinghub.elsevier.com/retrieve/pii/S0957416600001804
DOI:

10.1016/S0957-4166(00)00180-4

Notas: ISI, SCOPUS