VIBRATION ALANALYSES OF SOME INORGANIC HALIDES CONTAINING OXYGEN OR SULFUR

Author Institution: Los Alamos Scientific Laboratory, University of CaliforniaVibrational spectra will be discussed for the following molecules, together with applications to structure determinations and/or the calculation of force constants: (1) Metal oxide tetrafluorides: The infrared spectra of $MoOF_{4}$, $WOF_{4}$ and $ReOF_{4}$ vapors, obtained with a 10-m folded-path cell with metal mirrors, are consistent with only $C_{4v}$ symmetry. This is not the structure predicted by VSEPR theory and is further evidence for the influence of ligand repulsions in determining the stereochemistry of transition-metal compounds. (2) Other metal oxide halides: Infrared and Raman vapor spectra of permanganyl chloride ($MnO_{3}Cl$) and chromyl fluoride ($CrO_{2}F_{2}$) will be presented and discussed. (3) Thiophosphoryl fluoride: The controversial $P = S$ stretching frequency of $SPF_{3}$ has been unambiguously assigned from the vibrational spectrum of $^{34}SPF_{3}$. General quadratic force constants have been calculated and will be discussed