Solvent influence on complex formation between Cd2+ and 2-hydroxy-1,4-naphthoquinone in binary mixed nonaqueous solvents at 15–45°C
- Autores: Farazandeh R.1, Rounaghi G.1, Ebrahimi M.1, Basafa S.1
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Afiliações:
- Department of Chemistry, Faculty of Sciences
- Edição: Volume 91, Nº 4 (2017)
- Páginas: 678-684
- Seção: Physical Chemistry of Solutions
- URL: https://journals.rcsi.science/0036-0244/article/view/169401
- DOI: https://doi.org/10.1134/S0036024417040082
- ID: 169401
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Resumo
The complexation reaction of Cd2+ cation with 2-hydroxy-1,4-naphthoquinone (HNQ) was studied in acetonitrile (AN), 2-PrOH, ethyl acetate (EtOAc), EtOH, dimethylformamide (DMF) and in binary solutions AN–2-PrOH, AN–DMF, AN–EtOH, and AN–EtOAc using conductometric method at 15–45°C. The conductance data show that the stoichiometry of the Cd2+ complex with HNQ in all solvent systems is 1 : 1. In the pure solvents the stability of the complex changes in the order AN > 2-PrOH > EtOH > DMF. The stability of the complex at 25°C in the studied mixtures changes in the following order : AN−EtOAc > AN−2-PrOH > AN−EtOH > AN−DMF. These orders are affected by the nature and composition of the solvent systems and by the temperature. From the temperature dependence data, the thermodynamic functions values (ΔH° and ΔS°) for the complex formation were calculated.
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Sobre autores
R. Farazandeh
Department of Chemistry, Faculty of Sciences
Email: ghrounaghi@yahoo.com
Irã, Mashhad
G. Rounaghi
Department of Chemistry, Faculty of Sciences
Autor responsável pela correspondência
Email: ghrounaghi@yahoo.com
Irã, Mashhad
M. Ebrahimi
Department of Chemistry, Faculty of Sciences
Email: ghrounaghi@yahoo.com
Irã, Mashhad
S. Basafa
Department of Chemistry, Faculty of Sciences
Email: ghrounaghi@yahoo.com
Irã, Mashhad