The CH3 asymmetric stretchings of p‐halogenotoluenes

Abstract

AbstractThe vibrational spectra of p‐halogenotoluenes and o‐fluorotoluene in the region of the CH3 asymmetric stretchings are reported. The observed bands at 2997, 2987, 2975 and 2945 cm−1 at 77 K in p‐fluorotoluene are asslgned to the B2, A1, A2 and B1 modes, respectively, on the basis of the C20 symmetry. Two Raman bands at 2971 and 2945 cm−1 at 77 K in p‐chlorotoluene are assigned to the B2 and B1 modes, respectively, where the former in the liquid state is a polarized band and is assigned also to the A1 mode. This is also true for p‐bromotoluene.