| Popis: |
Measurements of the τs1R single particle correlation time for acetonitrile (in dilute solution in carbon tetrachloride) using far-infrared measurements have enabled us to compare the vibrational correlation times obtained using infrared and Raman bands arising from the same (A1) modes. The results of this comparison show, for the first time, that quantitiative differences do occur, especially for ν1 of acetonitrile, even in dilute solution. Possible reasons for this difference are discussed. It is emphasized that derivation of τs1R or τs2R correlation times from infrared or Raman spectra using τv from isotropic Raman band profiles may therefore give erroneous results. |
