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Polarized Raman and infrared spectra of (NH 3 ) 2 (CH 2 ) 2 HXO 4 (X =P, As)
Author(s) -
Philip Daizy,
Aruldhas G.
Publication year - 1990
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.1250210310
Subject(s) - raman spectroscopy , arsenate , rotational–vibrational coupling , chemistry , phosphate , infrared , crystallography , crystal (programming language) , ion , infrared spectroscopy , spectral line , analytical chemistry (journal) , inorganic chemistry , optics , physics , arsenic , organic chemistry , computer science , programming language , chromatography , astronomy
Polarized Raman and IR spectra of (NH 3 ) 2 (CH 2 ) 2 HPO 4 and (NH 3 ) 2 (CH 2 ) 2 HAsO 4 have been recorded and analysed. Crystal field effects are found to be stronger in the phosphate than in the arsenate and the symmetry of the anion is reduced from C 3v to C 1 . In the arsenate the ethylenediammonium groups are identical whereas in the phosphate they are crystallographically different. The effects of strong vibrational coupling between PO(H) stretching and POH out‐of‐plane bending modes are observed in the phosphate. It is found that the HAsO 4 2−has a greater angular distortion.