Ionization equilibria of nickel(II) bromide in acetonitrile solutions

Uv and visible absorption spectra and the molar conductance curve of NiBr 2 in acetonitrile solution have been determined at 25°C. Equilibrium concentrations and formation constants of the consecutive NiBr +, NiBr 0 2, and NiBr − 3, complexes have been calculated from the spectrophotometric results...

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Bibliographic Details
Published in:Electrochimica acta 1978-01, Vol.23 (8), p.791-798
Main Authors: Libus, Wlodzimierz, Grzybkowski, Waca̵w
Format: Article
Language:English
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Summary:Uv and visible absorption spectra and the molar conductance curve of NiBr 2 in acetonitrile solution have been determined at 25°C. Equilibrium concentrations and formation constants of the consecutive NiBr +, NiBr 0 2, and NiBr − 3, complexes have been calculated from the spectrophotometric results making use of the isosbestic points found in an auxiliary study of three-component solutions with variable Br −:Ni(II) mole ratio. The existence of NiBr + in the form of the [NiBr L 5] + pseudooctahedral complex, and that of NiBr − 3 in the form of the [NiBr 3 L] − pseudotetrahedral complex is inferred, while the nature of NiBr 0 2 remains unclear.
ISSN:0013-4686
1873-3859
DOI:10.1016/0013-4686(78)80041-3