Abstract

Raman and IR spectra of bromocyclohexane dissolved in methylcyclohexane, methanol, 1-propanol and 2-propanol have been recorded. The isotropic line widths of the CBr stretching mode for the axial (658 cm −1) and the equatorial (686 cm −1) conformers as well as of the ν 1 ring mode for the axial (804 cm −1) and the equatorial (811 cm −1) conformers have been measured as a function of concentration. The ratio of integral Raman intensities and IR absorptions of the axial and the equatorial conformers, the band widths and their concentration dependence for the CBr stretching mode differ considerably from those obtained for the ring mode ν 1. To make this discrepancy clearer we have studied solvent effect on vibrational dynamics of bromocyclohexane by using various models of vibrational dephasing.

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