Far-Infrared Group Frequencies. I. Aliphatic Alcohols

Abstract

The far-infrared spectra of a number of aliphatic alcohols have been recorded as dilute solutions in cyclohexane. A characteristic band is present at 210±5 cm −1 and is assigned to the hydroxyl torsion on the basis of the deuterium shifts. The position of the band is not sensitive to steric effects but is very sensitive to proximity of electron rich systems. The hydroxyl torsion shifts to ∼300 cm −1 in benzene. Uses of this group frequency for spectra structure correlations are discussed.