Premium
Infrared and Raman spectra of L ‐valine nitrate and L ‐leucine nitrate
Author(s) -
Rajkumar Beulah J. M.,
Ramakrishnan V.
Publication year - 2000
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 - 10.1002/1097-4555(200012)31:12<1107::aid-jrs652>3.0.co;2-6
Subject(s) - chemistry , raman spectroscopy , nitrate , hydrogen bond , protonation , valine , ion , crystallography , infrared , degeneracy (biology) , infrared spectroscopy , stereochemistry , molecule , amino acid , organic chemistry , physics , biochemistry , optics , bioinformatics , biology
A comparative study of the infrared and Raman spectra of L ‐valine nitrate and L ‐leucine nitrate helps in determining the role of hydrogen bonds in these crystals. Both compounds have carboxylic and protonated amino groups in the cation while the nitrate ion forms the anion. The wavenumbers of several modes of vibrations were shifted from the expected values in both crystals. The removal of degeneracy of certain modes of vibration of the methyl group suggests that the two methyl groups attached to the same carbon atom are not identical and the symmetry of both of these groups was affected in their respective environments. Copyright © 2000 John Wiley & Sons, Ltd.