Valence Force Constants of N-Benzylideneanilines

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Abstract
Valence force constants for N-benzylideneaniline and for two p,p′-disubstituted derivatives were estimated by means of a point-charge model using CNDO data. A vibrational assignment of bands which are sensitive to the electron donor-acceptor characteristic of substituents is proposed. The conformational changes are interpreted in terms of an intramolecular energy transfer between substituents.

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