Dynamical Evidence of Aggregates in Isomeric Alcohols Mixtures by O—H Stretching Band Analysis

Polarized and depolarized Raman data in mixed isomeric alcohols n-Pentanol and 2-Methyl-2-Butanol are presented. The spectra, obtained as a function of temperature and concentration, have been performed in the intramolecular O—H stretching region. The analysis of the spectral features of the deconvoluted bands, center frequency, percentage intensity and halfwidth, performed in the frame of a previous investigation on the pure components, shows that the aggregative processes, present in these H-bonded liquids, reflect themselves also on this spectral region furnishing evidence that, as evidenciated by other techniques, in the 2M-2BuOH rich region, the formation of hetero-structures, determining a strengthened respect to the more “fragile” pure tertiary alcohol, is present.