Summary
A spectrophotometric study of NiII chloro complexes in the u.v.-vis. region was carried out at 25 °C and constant ionic strength of 1 mol dm−3. A matrix rank treatment method was used to identify two successive mononuclear complexes, NiCl+ and NiCl2, in the three alcohols studied viz. MeOH, EtOH and i-PrOH. The best values for the apparent overall stability constants, β j , were calculated using a program based on the least-squares method. The log β 1 and log β 2 values in MeOH, EtOH and i-PrOH are 1.3 and 1.2, 1.7 and 1.8, and 1.9 and 2.2, respectively. The stability increases directly with the mol. wt. of the solvent, or decreases as a linear function of the permittivity of the pure solvent. The electronic spectra and the formation curves of the two complexes in MeOH solutions were calculated.
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Khan, M.A., Cronier, D., Bouet, G.M. et al. Spectrophotometric investigation of nickel(II) chloro complexes in alcoholic solutions. Transition Met Chem 20, 369–371 (1995). https://doi.org/10.1007/BF00139132
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DOI: https://doi.org/10.1007/BF00139132