Infrared Spectra of the Ammonium Ion in Crystals. I. Ammonium Hexachloroplatinate(IV) and Hexachlorotellurate(IV)
- 15 September 1975
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Chemistry
- Vol. 53 (18) , 2675-2682
- https://doi.org/10.1139/v75-379
Abstract
Infrared spectra of polycrystalline (NH4)2PtCl6 and (NH4)2TeCl6 at various degrees of deuteration were recorded between 4000 and 1000 cm−1 at 30 and −165 °C. The stretching and bending vibrations of NH4+, NH3D+, NH2D2+, NHD3+, and ND4+ ions in these two compounds were systematically examined. The observed fundamentals were unambiguously assigned by analogy with the vibrations of the partially deuterated methanes. The spectrum of isotopically dilute NH3D+ confirms the existence of only one crystallographically distinct type of ammonium ion in the structure, on sites of Td symmetry. Vibrational coupling of neighboring ammonium ions was not detected.Keywords
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