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Raman and infrared spectra of NH 4 H 2 (IO 3 ) 3 and KH 2 (IO 3 ) 3
Author(s) -
Santha N.,
Isaac M.,
Nayar V. U.,
Keresztury G.
Publication year - 1991
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250220711
Subject(s) - raman spectroscopy , octahedron , fermi resonance , infrared , infrared spectroscopy , chemistry , hydrogen bond , crystallography , spectral line , ion , resonance (particle physics) , ammonium , hydrogen , analytical chemistry (journal) , molecule , crystal structure , physics , atomic physics , organic chemistry , chromatography , astronomy , optics
Raman and infrared spectra of NH 4 H 2 (IO 3 ) 3 and KH 2 (IO 3 ) 3 were recorded and analysed. The observed splittings of the stretching modes of IO 3 − are due to the distortion of the IO 6 octahedra. In NH 4 H 2 (IO 3 ) 3 , the ammonium ion can rotate freely and the NH 4 + group forms only weak hydrogen bonds with the oxygen atom. Owing to Fermi resonance, three stretching bands are observed for the OH vibration in both compounds. The hydrogen bonds are slightly shorter in KH 2 (IO 3 ) 3 than in NH 4 H 2 (IO 3 ) 3 .