Model
Digital Document
Publisher
Florida Atlantic University
Description
Polarized electronic spectra of trans-diacidobis (ethylenediamine )-
chromium(III) complexes were measured at liquid nitrogen temperature,
the diacido groups being aquochloro, aquobromo, bromochloro, bis(N, N-dimethylformamide), chloro(N, N-dimethyl£ormamide) and bromo(N, N-dimethylformamide). The quadrate components of the first two cubic
bands were polarized and assigned on the basis of predicted polarization
pattern for D4h vibronic mechanism for d^3 configuration. The higher energy intraconfigurational doublets were uncovered in most of the systems. The bis(N, N-dimethylformamide) complex showed two high-energy spin-forbidden bands at ~32,000 cm^-1 not previously observed in
the spectra of chromium(III) complexes. The ligand field and electron
correlation parameters were evaluated by fitting the observed band maxima with d^3 quadrate energy equations including full configuration interaction but neglecting spin-orbit perturbation. The parameters of these complexes
and of the other trans-diacidobis (ethylenediamine) systems obtained by
others were analysed in terms of the bonding nature of ligands.
chromium(III) complexes were measured at liquid nitrogen temperature,
the diacido groups being aquochloro, aquobromo, bromochloro, bis(N, N-dimethylformamide), chloro(N, N-dimethyl£ormamide) and bromo(N, N-dimethylformamide). The quadrate components of the first two cubic
bands were polarized and assigned on the basis of predicted polarization
pattern for D4h vibronic mechanism for d^3 configuration. The higher energy intraconfigurational doublets were uncovered in most of the systems. The bis(N, N-dimethylformamide) complex showed two high-energy spin-forbidden bands at ~32,000 cm^-1 not previously observed in
the spectra of chromium(III) complexes. The ligand field and electron
correlation parameters were evaluated by fitting the observed band maxima with d^3 quadrate energy equations including full configuration interaction but neglecting spin-orbit perturbation. The parameters of these complexes
and of the other trans-diacidobis (ethylenediamine) systems obtained by
others were analysed in terms of the bonding nature of ligands.
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