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Vibrations de Basses Fréquences du Cristal de m ‐Chloronitrobenzène
Author(s) -
Le Calvé N.,
Romain F.,
Pasquier B.
Publication year - 1979
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.1250080504
Subject(s) - raman spectroscopy , intramolecular force , lattice vibration , infrared , crystallography , chemistry , infrared spectroscopy , materials science , nuclear magnetic resonance , physics , stereochemistry , condensed matter physics , optics , phonon , organic chemistry
Polarized Raman and infrared spectra of meta ‐chloronitrobenzene single crystals have been investigated in the ranges 140‐5 cm −1 and 140–20 cm −1 respectively. They are compared to those of meta ‐bromonitrobenzene recorded for comparison. All 21 lattice vibrations expected have been observed and assigned to their symmetry species and in terms of translational and rotatory vibrations. The only intramolecular mode, a NO 2 torsion, has been identified near 93 cm −1 giving rise to four components in the crystal. The corresponding potential barrier V 2 = V */4 has been calculated.