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Vibrational spectra of the peroxochromates (NH 4 ) 3 [Cr(O 2 ) 4 ], K 3 [Cr(O 2 ) 4 ] and Rb 3 [Cr(O 2 ) 4 ]
Author(s) -
Haeuseler H.,
Haxhillazi G.
Publication year - 2003
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.990
Subject(s) - raman spectroscopy , infrared spectroscopy , dodecahedron , chemistry , analytical chemistry (journal) , crystallography , infrared , x ray crystallography , space group , powder diffraction , diffraction , physics , organic chemistry , optics , chromatography
The compounds (NH 4 ) 3 [Cr(O 2 ) 4 ], K 3 [Cr(O 2 ) 4 ] and Rb 3 [Cr(O 2 ) 4 ] were prepared and investigated by x‐ray powder methods and Raman and IR spectroscopy. From the powder x‐ray diffraction data it is shown that both (NH 4 ) 3 [Cr(O 2 ) 4 ] and Rb 3 [Cr(O 2 ) 4 ] are isotypic to the K 3 [Cr(O 2 ) 4 ] type (space group I 4 2 m , No. 121). The infrared and Raman spectra (recorded on powdered samples) are discussed with respect to the internal vibrations of the peroxo group and the dodecahedral [Cr(O 2 ) 4 ] 3− ion. The stretching vibrations of the O 2 2− groups are found at 838 (Raman) and 813 cm −1 (IR). The preparation of the corresponding cesium compound did not succeed as the samples exploded. Copyright © 2003 John Wiley & Sons, Ltd.