RAMAN SPECTRAL STUDY OF VIBRATIONAL-RELAXATION OF THE C-EQUIVALENT-TO-N STRETCHING BAND OF ACETONITRILE AND BENZONITRILE

Raman spectroscopic studies on acetonitrile and benzonitrile as the li quids and in dilute solutions were used to investigate the vibrational relaxation processes which lead to broadening of the C = N stretching vibrational band. Line widths of isotropic Raman spectra in a number of solvents revealed the quantitative dependence of vibrational relaxa tion rate on the hydrodynamic and dispersion forces.