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Potentiometric Study of Speciation and Thermodynamics of Complex Formation Equilibria of Diorganotin(IV) Dichloride with 1-(2-Aminoethyl)piperazine

Journal of Solution Chemistry volume 45, pages 410–430 (2016)Cite this article

Abstract

The interaction of DET (diethyltin(IV)) and DVT (divinyltin(IV)) with 1-(2-aminoethyl)piperazine (AEP) was investigated potentiometrically at different temperatures in 0.1 mol·dm−3 NaNO3. The hydrolysis constants of diethyltin(IV) and divinyltin(IV) cations and the stepwise formation constants of the complexes formed in solution were calculated at different temperatures and in solutions of dioxane–water solutions of different compositions. The stoichiometries and stability constants for the complexes formed are reported. The results show formation of 1:1 complexes and the corresponding hydroxide complexes. The concentration distributions of the various complex species were evaluated as a function of pH. The thermodynamic parameters ΔH° and ΔS° calculated from the temperature dependence of the equilibrium constants were investigated for DET and DVT complexes with AEP.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, Cairo University, Cairo, Egypt

    Ahmed A. El-Sherif, M. R. Shehata & Mohamed M. Shoukry

  2. Regional Center for Food and Feed (RCFF), Agricultural Research Center, Cairo, Egypt

    N. Mahmoud

Authors
  1. Ahmed A. El-Sherif
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  2. M. R. Shehata
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  3. Mohamed M. Shoukry
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  4. N. Mahmoud
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Correspondence to Ahmed A. El-Sherif.

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El-Sherif, A.A., Shehata, M.R., Shoukry, M.M. et al. Potentiometric Study of Speciation and Thermodynamics of Complex Formation Equilibria of Diorganotin(IV) Dichloride with 1-(2-Aminoethyl)piperazine. J Solution Chem 45, 410–430 (2016). https://doi.org/10.1007/s10953-016-0450-5

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  • DOI: https://doi.org/10.1007/s10953-016-0450-5

Keywords

  • Formation equilibria
  • Diethyltin (IV)
  • Divinyltin(IV)
  • Piperazine
  • Dioxane
  • Thermodynamics
  • Speciation