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Raman spectra of molecular crystals at high pressures. Part VI—bromine cyanide
Author(s) -
Sanders Angela,
Louie Marilyn,
Anderson A.
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<1079::aid-jrs648>3.0.co;2-g
Subject(s) - raman spectroscopy , bromine , libration (molecule) , intermolecular force , chemistry , dissociation (chemistry) , cyanide , ambient pressure , degree of unsaturation , spectral line , raman scattering , crystallography , photochemistry , chemical physics , molecule , inorganic chemistry , organic chemistry , optics , thermodynamics , physics , geometry , point (geometry) , mathematics , astronomy
Raman spectra of solid bromine cyanide, BrCN, at ambient temperature and at pressures up to 12 GPa are reported. The spectra evolve smoothly and there is no evidence of any structural phase transitions or of any major molecular distortions in this pressure range. The four main peaks (librational, bending and two stretching modes) all show increases in wavenumber with pressure, with that for the libration being most pronounced, as a result of a threefold strengthening of intermolecular bonding. At high pressures, prolonged exposure to large visible photon fluxes causes the onset of irreversible colour changes attributed to molecular dissociation and the release of bromine. Copyright © 2000 John Wiley & Sons, Ltd.