Potentiometric and Thermodynamic Studies of Some Azosulfoxine Derivatives and Their Metal Complexes

Authors

  • A.A. El-Bindary Damietta University, Faculty of Science
  • A.Z. El-Sonbati University of Damietta
  • M.A. Diab University of Damietta
  • A.M. Barakat University of Damietta

DOI:

https://doi.org/10.6000/1929-5030.2013.02.03.4

Keywords:

Azosulfoxines, potentiometry, stability constants and thermodynamics

Abstract

The proton-ligand dissociation constants of some azosulfoxine derivatives and metal-ligand stability constants of their complexes with the metal ions (Mn2+, Co2+, Ni2+ and Cu2+) have been determined potentiometrically in 0.1 M KCl and 50 % (by volume) DMF–water mixture at (298, 308 and 318) K. The stability constants of the formed complexes increases in the order Mn2+, Co2+, Ni2+ and Cu2+. The effect of temperature was studied and the corresponding thermodynamic parameters (ΔG, ΔH and ΔS) were derived and discussed. The dissociation process is non-spontaneous, endothermic and entropically unfavourable. The formation of the metal complexes has been found to be spontaneous, endothermic and entropically favourable.

Author Biographies

  • A.A. El-Bindary, Damietta University, Faculty of Science
    Chemistry
  • A.Z. El-Sonbati, University of Damietta
    Department of Chemistry, Faculty of Science
  • M.A. Diab, University of Damietta
    Department of Chemistry, Faculty of Science
  • A.M. Barakat, University of Damietta
    Department of Chemistry, Faculty of Science

References


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Published

2013-08-31

Issue

Vol. 2 No. 3 (2013)

Section

General Articles

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How to Cite

Potentiometric and Thermodynamic Studies of Some Azosulfoxine Derivatives and Their Metal Complexes. (2013). Journal of Applied Solution Chemistry and Modeling, 2(3), 191-196. https://doi.org/10.6000/1929-5030.2013.02.03.4

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