The application of an effective nuclear charge model to the prediction of valence force constants in planar and pyramidal XY3 molecules. II.

Abstract

The valence force constants of planar and pyramidal XY3 molecules are calculated on the basis of the effective nuclear charge model previously developed. The calculated results are compared with the experimental force constants which are determined by the normal coordinate analysis. The agreement between the calculated and experimental force constants is moderately good for most molecules under investigation. This implies that the effective nuclear charge model is useful for the prediction of approximate valence force constants in more complicated polyatomic molecules.