VIBRATIONAL ANALYSIS OF SUBSTITUTED ANILINES, ANISOLES AND ANISIDINES .2. TRANSFERABILITY OF VALENCE FORCE-CONSTANTS

A zero-order normal coordinate analysis was made for the in-plane vibrations of 2,6-dinitroaniline, 3,5-dichloro-p-anisidine, 3,5-dibromo-p-anisidine and 2,6-dibromo-4-nitroanisole by transferring the force constants obtained beforehand. The transferability of the force constants was demonstrated by the good agreement between the observed and calculated frequencies. On the basis of the calculated potential energy distributions and eigenvectors, several assignments suggested by earlier workers have been revised.