The Raman and infrared spectra of difluorophosphine and difluorophosphine-dl in the gaseous and solid phases from 100 to 3000 cm-' have been recorded. The six fundamental frequencies have been assigned on the basis of group frequencies, depolarization ratios, band types and isotopic shifts. A normal coordinate analysis was carried out. Very little mixing was found to occur between the normal modes. Thermodynamic functions were calculated from the observed frequencies and previously reported moments of inertia.
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