Abstract

A theoretical analysis of vibrational spectra of phthalimide and isatin is carried out by the DFT/b3LYP method. The influence of intermolecular interaction in dimers of the compounds is estimated. It is shown that one can reliably interpret vibrational spectra of conjugated cyclic compounds, construct structural-dynamic models for dimers of such compounds, and predict a mechanism for intermolecular interaction based on nonempirical quantum calculations of the adiabatic potential.

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