Abstract
Abstract The isotropic Raman band-widths of the ν CN stretching mode and ν 2 (A 1 ) mode of benzonitrile in the H-bonded complex with various phenols have been studied as a function of concentration and temperature. The ν CN and ν 12 band of free benzonitrile has been analyzed in terms of the isolated binary collision model. The ν 12 band of the complexed benzonitrile has been analysed in terms of the coupling of the oscillators and the dipolar coupling theory. The changes in the spectral profiles produced by the sub- stituent in phenols can be understood in terms of the dipolar coupling theory. It was shown that both the strength of the H-bond and the viscosity of the solution are important factors for the band broadening in H-bonded complexes.
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