ANOMALOUS EFFECTS IN THE TEMPERATURE-DEPENDENCE OF DEPOLARIZED RAYLEIGH SPECTRA OF BENZENE AND QUINOLINE

The temperature dependence of vertically (incident) and horizontally ( scattered) depolarized spectra of benzene and quinoline has been very carefully investigated. For more confidence, in benzene, independent m easurements with different techniques were performed both in Bordeaux and Messina. The reorientational correlation time shows an overall beh avior equivalent to that previously reported when temperature varies b y steps of the order of a few K. Anomalous behavior is, however, obser ved for both neat liquids at given very well reproducible temperatures when temperature varies by small steps. These temperatures may corres pond to regions where molecular reorientation is slowed down.