Sound Propagation in Some Mono- and Disubstituted Derivatives of Benzene

The extensive data of Lutskii and Solonko (1964) for sound velocity in phenol, dihydroxy phenols, nitrophenols, chlorophenols, cresols, anisole and its derivatives do not give sufficient information about hydrogen bonding in these compounds. Hence these were analysed with the help of Schaaffs' collision factor theory. The molecular parameters: collision factor and inner atomic summation were calculated at different temperatures (20 to 190 °C).

The analysis reveals that the inner atomic summations for intramolecular hydrogen bonded compounds have higher values than normal compounds and are independent of temperature. For compounds showing intermolecular hydrogen bonding, on the other hand, the values decrease markedly with temperature indicating the successive breaking down of such hydrogen bonds with increase in temperature.