Vibrational analysis of vanadium hexafluoride and uranium hexafluoride species in oxidation states

The general quadratic valence force field has been applied to vanadium hexafluoride and uranium hexachloride species in oxidation states using molecular kinetic constants and Willison's FG matrix method. The ionic character of the bond is briefly discussed. Other molecular characteristic constants such as the compliance constants, vibrational mean amplitudes, shrinkage constants, Coriolis coupling constants and rotational distortion constants are reported for the first time for these ions. The results are interesting from the point of view of molecular dynamics. It is also shown that the kinetic constants method leads to acceptable sets of molecular constants for these cases. (author)