Infrared studies of hydrogen bonding between pyridine and alcohols

Abstract

Infrared spectroscopic measurements, over a 30° temperature range, of the fundamental stretching frequency of the hydroxyl group, have enabled the enthalpy of hydrogen bonding association (ΔH, kcal mole^-1) to be calculated for pyridine with propan-1-ol (-4.3), propan-2-ol (-6.l), butan-1-ol (-5.0), and butan-2-ol (-4.1). Corrections for self-association of the alcohols were applied, and the effect of traces of water was studied.