Abstract
Infrared and Raman spectra of polycrystalline and polarized IR spectra of the ac face of H 3PO 2 and D 3PO 2 are reported and analysed with particular respect to hydrogen bonding. The vOH stretching mode shows a large factor group splitting and a negative mass effect on frequency. The spectra of D 3PO 2 show more bands than those of H 3PO 2 (and more than predicted by the factor group analysis) suggesting a lowering of the symmetry.
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