The Association, Formation Constants and Gibbs Energies of Solvation for CoCl2 Stoichiometric Complexes with (E)-1-phenyl-2-(2-(4-((E)-phenyldiazenyl))phenyl hydrazono)-2-(phenylsulfonyl)ethanone at Different Temperatures

E A Gomaa,H M Abu El-Nader,Sh E Rashed

doi:10.5923/j.pc.20120203.01

Abstract

the association constants, formation constants and Gibbs free energies of solvation are calculated from the conductometric titration curves of CoCl2 with (E)-1-phenyl-2-(2-(4-((E)-phenyldiazenyl)phenyl)hydrazono)-2- (phenylsulfonyl) ethanone (L) in absolute ethanol at 293.15, 298.15, 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 and Gibbs free energies of these different complexes in absolute ethanol at 293.15, 298.15, 303.15 and 308.15 K follow the order: Kf (2:1) > Kf (1:1) > Kf (1:2) for (M:L); and âGf (2:1) > âGf (1:1) > âGf (1:2) for (M:L).

Highlights

The long range ion–ion interactions due to columbic forces are the most important features of electrolyte in solutions
Metal cations with do noble gas electron configuration metal ions together with the inert molecular ions like tetraalkylammonium, -phosphonium, -arsonium, and trialkylsulfonium ions exhibit properties mainly determined by their charge and size[1]
The aim of this work is the evaluation of the non-covalent behaviour of CoCl2 in presence of (E) -1- phenyl -2- (2- (4-((E) -phenyldiazenyl)phenyl)hydrazono)-2-(phenylsulfonyl)etha none (L1) in absolute ethanol solutions at 293.15, 298.15, 303.15 and 308.15 K. these non-covalent interactions can help us for analysis of salts role in bodies and environment

Summary

Introduction

The long range ion–ion interactions due to columbic forces are the most important features of electrolyte in solutions. Metal cations with do noble gas electron configuration (alkali and alkaline earth) metal ions together with the inert molecular ions like tetraalkylammonium, -phosphonium, -arsonium, and trialkylsulfonium ions exhibit properties mainly determined by their charge and size[1]. Solvation of such cations in protic and polar solvents is due essentially to electrostatic ion-dipole and ion induced dipole interactions.Metal cations with filled d-orbitals, the d10 cations,exhibits partially covalent character in their interactions, their properties depend

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