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Infrared and laser Raman spectra of bis( DL ‐methioninium) sulfate
Author(s) -
Ramaswamy S.,
Rajaram R. K.,
Ramakrishnan V.
Publication year - 2005
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.1358
Subject(s) - raman spectroscopy , chemistry , infrared , bending , hydrogen bond , wavenumber , intermolecular force , infrared spectroscopy , excited state , molecular physics , laser , crystal (programming language) , degenerate energy levels , raman scattering , crystallography , materials science , molecule , atomic physics , optics , physics , organic chemistry , quantum mechanics , computer science , composite material , programming language
The infrared and laser‐excited Raman spectra of bis( DL ‐methioninium) sulfate crystal were recorded and analyzed at room temperature. The vibrational assignments of the observed wavenumbers were made based on group theoretical analysis. The presence of CO group is confirmed. Factor group analysis was carried out and the number of normal vibrational modes was calculated. The shifting of several stretching and bending wavenumbers suggests that the extensive intermolecular hydrogen bonding causes both linear and angular distortions of several groups. The splitting of the threefold degenerate stretching and bending modes of the sulfate group confirms the distortion of its T d symmetry due to hydrogen bonding. Copyright © 2005 John Wiley & Sons, Ltd.