Cobalt(II) halide complexes in aqueous ammonium nitrate–calcium nitrate melts: electronic spectra and solvent extraction
- 1 January 1986
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 8,p. 1663-1668
- https://doi.org/10.1039/dt9860001663
Abstract
Addition of chloride or bromide to cobalt(II) dissolved in a low-temperature aqueous nitrate melt [xNH4NO3·yCa(NO3)2·zH2O] changed the electronic absorption spectrum from near-octahedral co-ordination by both nitrate and water to a tetrahedral (or severely distorted octahedral) symmetry with between two and three halide ligands, the bromide species containing less water. The effects of varying the concentrations and of increasing temperature are discussed. Solvent-extraction measurements were made and the spectra of the organic and salt phases recorded.Keywords
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