Standard thermodynamic functions of Co2+ complexation with glycine and L-histidine in aqueous solution
- Autores: Gorboletova G.1, Metlin A.1
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Afiliações:
- Ivanovo State University of Chemistry and Technology
- Edição: Volume 90, Nº 2 (2016)
- Páginas: 334-338
- Seção: Physical Chemistry of Solutions
- URL: https://journals.rcsi.science/0036-0244/article/view/167712
- DOI: https://doi.org/10.1134/S0036024416010118
- ID: 167712
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Resumo
The enthalpies of the reactions between solutions of Co(NO3)2 and solutions of glycine (Gly) and L-histidine (His) are determined via direct calorimetry at different pH values and metal: ligand ratios using KNO3 as a background electrolyte (T = 298.15 K, I = 0.2–1.0). The enthalpy changes upon the formation of cobalt glycinate complexes and Co2+ mixed-ligand complex, viz., glycine–L-histidine, were calculated. The standard thermodynamic parameters (ΔrH°, ΔrG°, ΔrS°) of complexation are determined. The CoGlyHis complex is shown to be stable toward decomposition into homogeneous complexes.
Sobre autores
G. Gorboletova
Ivanovo State University of Chemistry and Technology
Autor responsável pela correspondência
Email: gorboletova@mail.ru
Rússia, Ivanovo, 153000
A. Metlin
Ivanovo State University of Chemistry and Technology
Email: gorboletova@mail.ru
Rússia, Ivanovo, 153000