alexa Thermodynamics of Complex Formation ( conductometricall
e-ISSN: 2319-9849

Research & Reviews: Journal of Chemistry
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Research Article

Thermodynamics of Complex Formation ( conductometrically) Between Cu(II) ion and 4-phenyl -1- diacetyl monoxime –3 -thiosemicarbazone (BMPTS) in Ethanol at Different Temperatures

EA Gomaa*, KM Ibrahim, and NM Hassan.

Chemistry Department, Faculty of Science, Mansoura University, 35516 – Mansoura, Egypt

*Corresponding Author:
EA Gomaa
Chemistry Department, Faculty of Science
Mansoura University, 35516 – Mansoura, Egypt

Received date: 22/11/2013; Revised date: 15/12/2013; Published date: 29/12/2013

 

Abstract

The association constant ,formation constants and Gibbs free energies are calculated from the conductometric titration curves of CuCl2 with 4-phenyl-2-diacetyl monoxime-3-thiosemicarbazone (BMPTS) in absolute ethanol at different temperatures (293.15 K , 298.15 K , 303.15 and 308.15 K). On drawing the relation between molar conductance and the ratio of metal to ligand concentrations, different lines are obtained indicating the formation of 1:2 , 1:1 and 2:1 (M:L) stoichiometric complexes. The formation constants of different complexes in absolute ethanol follow the order: Kf (2:1) › Kf (1:1) >Kf (1:2) for (M: L). As the temperature increases, the formation constants and association constants of different complexes increase. The enthalpy and entropy of formation and association of CuCl2 with (BMPTS) were also estimated and their values were also discussed.

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