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Preresonance Raman spectroscopy of the rhodium hexabromide anion
Author(s) -
Spoonhower John P.
Publication year - 1981
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.1250110307
Subject(s) - raman spectroscopy , chemistry , ion , spectroscopy , excitation , polarization (electrochemistry) , octahedron , ultraviolet , atomic electron transition , rhodium , ground state , molecular electronic transition , octahedral symmetry , coherent anti stokes raman spectroscopy , spectral line , raman scattering , atomic physics , optics , molecule , physics , biochemistry , organic chemistry , quantum mechanics , astronomy , catalysis
Raman spectroscopy was used in structural studies of solution‐phase RhBr 6 3− anions. The observed spectra are consistent with an octahedral ground‐state structure. Polarization measurements of the ν 1 (A 1g ) and ν 2 ( E g ) vibrational modes support the contention of cubic symmetry. The degree of polarization of these lines is independent of laser wavelength, not unlike observations of other d 6 hexahalide complexes. No resonance enhancement is observed with either T 1g or T 2g electronic transitions in the visible spectral region. Rather it is believed that the Raman transitions obtain intensity by way of virtual excitation of the allowed T 1u electronic transition in the near‐ultraviolet portion of the spectrum.