ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7

Published monthly

Potentiometric and Conductometric Studies on the Complexes of Some Transition Metals with Rhodanine Azosulfonamide Derivatives. XI

A. T. Mubarak, A. Z. El-Sonbati, and A. A. El-Bindary

Department of Chemistry, Faculty of Science, King Khalid University, P.O.Box 9004, Abha 61413, Saudi Arabia



Received: 29 September 2003

Abstract: Stability constants of bivalent (Mn2+, Co2+, Ni2+, and Cu2+) metal ion complexes with rhodanine azosulfonamide derivatives have been determined potentiometrically in 0.1 M-KCl and 30 vol. % ethanol—water mixture. The stability constants of the formed complexes increase in the order Mn2+, Co2+, Ni2+, Cu2+. The influence of substituents on the stability of the complexes was examined on the basis of electron repelling property of the substituent. The effect of temperature on the stability of the complexes formed was studied and the corresponding thermodynamic quantities (ΔG, ΔH, and ΔS) were derived and discussed. The stoichiometries of these complexes were determined conductometrically and indicated the formation of 1:1 and 1:2 (n(metal):n(ligand)) complexes.

Full paper in Portable Document Format: 585a320.pdf


Chemical Papers 58 (5) 320–323 (2004)

Sunday, June 23, 2024

SCImago Journal Rank 2021
European Symposium on Analytical Spectrometry ESAS 2022
© 2024 Chemical Papers