Electronic and vibrational spectra of trans-(NiCl/sub 4/(H/sub 2/O)/sub 2/)/sup 2 -/ anions in crystalline Rb/sub 2/NiCl/sub 4/. 2H/sub 2/O and the effective symmetry of mixed-ligand nickel(II) complexes
Raman, far infrared, and electronic absorption spectra have been recorded for the (NiCl/sub 4/(H/sub 2/O)/sub 2/)/sup 2 -/ anion in dirubidium tetrachlorodiaquonickelate(II), Rb/sub 2/NiCl/sub 4/.2H/sub 2/O. The vibrational spectra are analyzed in terms of an effective anion symmetry sufficiently low to remove all eigenstate degeneracies, while the d-electron ligand-field band shapes do not reflect the low crystallographic site symmetry of the Ni/sup 2 +/ ion. The effect of low symmetry and magnetic ordering on the polarized intensities of some zero-phonon electronic fine-structure lines is discussed, and the energy separations between these zero-phonon origins and vibronic side bands are correlated with the observed anion normal modes of vibration.
- Research Organization:
- Oak Ridge National Lab., TN
- OSTI ID:
- 5378532
- Journal Information:
- J. Chem. Phys.; (United States), Vol. 64:6
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
NICKEL CHLORIDES
ELECTRONIC STRUCTURE
VIBRATIONAL STATES
RUBIDIUM COMPLEXES
ABSORPTION SPECTRA
INFRARED SPECTRA
RAMAN SPECTRA
ALKALI METAL COMPLEXES
CHLORIDES
CHLORINE COMPOUNDS
COMPLEXES
ENERGY LEVELS
EXCITED STATES
HALIDES
HALOGEN COMPOUNDS
NICKEL COMPOUNDS
SPECTRA
TRANSITION ELEMENT COMPOUNDS
400201* - Chemical & Physicochemical Properties