Stability of coordination compounds of Ni2+ and Co2+ ions with succinic acid anion in water–ethanol solvents
- Authors: Tukumova N.V.1, Dieu Thuan T.T.2, Usacheva T.R.1, Koryshev N.E.1, Sharnin V.A.1,3
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Affiliations:
- Ivanovo State University of Chemistry and Technology
- Institute of Research & Development
- Krestov Institute of Solution Chemistry
- Issue: Vol 91, No 4 (2017)
- Pages: 662-666
- Section: Physical Chemistry of Solutions
- URL: https://journals.rcsi.science/0036-0244/article/view/169393
- DOI: https://doi.org/10.1134/S003602441704029X
- ID: 169393
Cite item
Abstract
Stability constants of the coordination compounds of nickel(II) and cobalt(II) ions with succinic acid anion in water–ethanol solvents are determined via potentiometric titration at ionic strength of 0.1 and at T = 298.15 K. It is found that logβ values of monoligand complexes of these ions and succinic acid anions rise along with the content of ethanol in solution (XEtOH = 0–0.7 mole fractions). Based on an analysis of the thermodynamic characteristics of the solvation of the reagents involved in complex formation, it is found that the increased stability of succinate complexes of nickel(II) and cobalt(II) ions in water–ethanol solvents is mainly determined by the weakening of the solvation of succinic acid anion (Y2−).
About the authors
N. V. Tukumova
Ivanovo State University of Chemistry and Technology
Author for correspondence.
Email: oxt-503@isuct.ru
Russian Federation, Ivanovo, 153000
Tran Thi Dieu Thuan
Institute of Research & Development
Email: oxt-503@isuct.ru
Viet Nam, Da Nang
T. R. Usacheva
Ivanovo State University of Chemistry and Technology
Email: oxt-503@isuct.ru
Russian Federation, Ivanovo, 153000
N. E. Koryshev
Ivanovo State University of Chemistry and Technology
Email: oxt-503@isuct.ru
Russian Federation, Ivanovo, 153000
V. A. Sharnin
Ivanovo State University of Chemistry and Technology; Krestov Institute of Solution Chemistry
Email: oxt-503@isuct.ru
Russian Federation, Ivanovo, 153000; Ivanovo, 153045