Association equilibria of co (II)‎ and cu (II)‎ complexes of salicylidine p-chloroaniline in different solvents

Abstract EN

The electrical conductivity of cobalt salicylidiene chloroaniline and cupper salicylidiene chloroaniline in water, methanol, ethanol, isopropanol and mixture of watermethanol with different composition (100-20 %) were measured at 303K.

The molar conductivity of the complexes were treated by Lee-Wheaton equation and Kohlrausch equations.

The limiting molar conductivity (o M2 λ +), (o MX λ +), the ionic association constant (KA) as well as the main distance between cations and anions (R) were measured.

Generally, it was found from the analysis of the results that (o M2 λ +) decreases with decreasing the variation of dielectric constant of the solvents as well as decreasing the percentage of water.

The association constants of the two complexes were increased with decreasing the dielectric constants and increasing of viscosity.

The distance parameter (R) indicated that the ions existed as solvent separated ion-pairs (SSIP).