The frequencies, anharmonicities, and apparent dissociation energies of some (C–H) bonds

Abstract

The vibrational frequencies of the fundamentals and of the first and second overtones of fifteen molecules each containing one (C–H) bond have been measured for liquid and solution (CCl₄) states in the infrared region. Consideration is given to the medium effect on the frequencies in deducing the vibrational anharmonicity. Dissociation energies are deduced for the various (C–H) bonds on the basis of potential functions due to Morse and to Lippincott: these are compared with the thermochemical values and the data discussed. Individual (C–H) bonds do not generally conform well to the simple energy functions for diatomic molecules.