Dependence of the frequencies of intermolecular vibrations of associated water molecules upon the size of the association complexes

Abstract

The intermolecular vibration frequencies for associated water molecules have been calculated by the Elyashevich-Wilson technique. Slight variations of the geometric parameters of the water molecules and hydrogen bridges leave the intermolecular vibration frequencies almost unaffected. The values of these frequencies depend solely upon the force constants of the hydrogen bonds and the angles adjacent to a hydrogen bond. The spectra of associations containing two, three, four, and five water molecules are found to be sufficiently distinct from each other for their differences to be detected by experiment.