Measurements of the anisotropic Rayleigh and the allowed Raman spectra of carbon disulphide over the normal liquid range are described. The Raman reorientation times agree well with N.M.R. values and are qualitatively well predicted by the Stokes-Einstein-Debye formula with slip boundary conditions, although significant departures are found. The Hubbard relationship is obeyed. A careful comparison of the Rayleigh and anisotropic Raman intensities indicates that the orientational correlation parameter (g2) decreases with increasing temperature. Using values of g~ obtained in this way the ratio of the Rayleigh and Raman reorientation times is shown to be consistent with a small value for the correlation in angular velocity between molecules. The vibrational dephasing time is found to be roughly constant with temperature in contrast with the predictions of the theories for this quantity. An attempt is made to correlate its behaviour with that of the collision induced Raman spectra of CSv
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