A mean field analysis of the O-H stretching Raman spectra in methanol/carbon tetrachloride mixtures.
The O-H stretching region of the Raman spectra obtained from methanol/carbon tetrachloride mixtures of different compositions is analyzed. The various components of the spectra associated with methanol molecules with different H-binding states (i.e., non-H-bonded, chain-end, and doubly bonded) are quantitatively related with the alcohol cluster distribution derived by means of a simple lattice model. This comparison allows for the estimate of the mean overall hydrogen bonding energy by means of a best fitting procedure on the Raman data obtained at low-to-moderate alcohol contents; the solvation energy contribution of carbon tetrachloride is then also included. The result (approximately 3 kcal/mol) is found to be in agreement with the estimates from calorimetric and dielectric measurements.
Fazio
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B
CNR, Istituto per i Processi Chimico-Fisici Sez. Messina, Via La Farina 237, I-98123 Messina, Italy.
Pieruccini
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M
Vasi
C
C