Potential Field and Force Constants of Octahedral Molecules

Abstract

The force constants of 10 molecules and 5 ions of the type XY6 belonging to the Oh symmetry are calculated from the observed frequencies by Wilson's F—G matrix method, using Raman and infrared data. Although only one force constant is neglected, imaginary results were found in the cases of MoF6 and WF6. Possible causes for this are discussed.