ASSOCIATION OF METHANOL IN VAPOR AND IN N-HEXADECANE . A MODEL FOR ASSOCIATION OF ALCOHOLS

A new model is proposed for the self-association of methanol in nonpolar solvents and in the vapor phase. The model is based on vapor pressure measurements for methanol in n-hexadecane at 25, 35, and 45° and on PVT measurements on methanol vapor at 15, 25, and 35°. These data are best explained by assuming the presence of only two associated species: trimers and octamers. The model has been applied with success to infrared spectral data for several alcohols; it has also been tested on nmr data for alcohols in CCl4 with mixed results.