VIBRATIONAL DEPHASING OF AXIAL AND EQUATORIAL CONFORMERS IN CYCLOHEXYL BROMIDE

The Raman and IR spectra of the C-Br stretching mode in the axial and the equatorial positions of cyclohexyl bromide have been measured at r oom temperature. The mechanism and the differences in the rate of vibr ational dephasing of the axial and the equatorial conformers are discu ssed. It is found that intermolecular long range transition dipole-tra nsition dipole coupling gives the main contribution to the differences in vibrational dephasing rate of both conformers.