Vibrational analysis of substituted anisoles. II –Transferability of valence force constants

A zero‐order vibrational analysis of the in‐plane vibrations is made for m ‐fluoro‐, o ‐chloro‐, p ‐chloro‐, o ‐bromo‐and p ‐bromo‐anisole, transferring the force constants from Part I. The observed and calculated frequencies agree with an average error of 13 cm −1 , demonstration the transferability of the force field obtained in Part I. On the basis of the calculated potential energy distributions and eigenvectors, several assignments suggested by earlier workers have been revised.