Influence of local molecular order on non-coincidence in the Raman spectra of methanol in liquid mixtures. I — non-polar solvent: carbon tetrachloride

The non-coincidence Δ ν = νaniso − νiso was investigated in the Raman spectra of OH and CO bands of methanol diluted with carbon tetrachloride. Dilution with carbon tetrachloride brings about an increase in the negative non-coincidence of the CO band from −5 to −12 cm−1 and leaves it almost constant for the OH band. The behaviour of the non-coincidence value of the CO band is interpreted as the result of a change in molecular local order.