Evaluation of Force Constants of Tetrahedral Hydrides from Raman and Infrared Data

Abstract

The force constants of 4 molecules and 4 ions of the type XH₄ belonging to the T_d symmetry have been calculated by Wilson's F–G matrix method, using Raman and infrared data. Using a modified Urey‐Bradley field, the force constants between nonbonded atoms were calculated separately and substituted in the main equations. Anharmonicity was not taken into account.