Electronic spectra of carbonato and oxalato ammine complexes of cobalt(III); average field model for singlet, triplet, and charge transfer bands

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Abstract
The electronic spectra in ligand field (singlet and triplet) and charge transfer regions have been determined for a series of mixed carbonato and oxalato ammine complexes of Co(III). An average field model is shown to be quite adequate to complete interpretation of the spectra. The values of Δ appear to be dominated by σ bonding interactions. Full analysis of triplet bands reveals an abnormal C/B ratio which emphasizes the limitations to be placed on the interpretation of the values of parameters derived from first order perturbation theory parameterization of experimental spectra.

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