Infrared spectroscopy study of cyclopentanol self-associations

The predominant self-associations of cyclopentanol were determined from infrared data in toluene at 25 and 55 degrees C, and in di-n-butyl ether and acetonitrile at 25 degrees C. These associations correspond to a monomer-dimer-tetramer model in acetonitrile and di-n-butyl ether, and to a monomer-dimer-hexamer model in toluene. The molar extinction coefficients of the non-associated hydroxylic functions were determined in order to calculate the concentrations of the associated species and the corresponding equilibrium constants.