ELECTRICAL CONDUCTANCE AND IONPAIR FORMATION OF COBALT(II) COMPLEXES OF ACETOPHENONETHIOSEMICARBAZONE HALIDES IN METHANOL-WATER MIXTURE AT 25-DEGREES-C

Conductance of CO(II) complexes of acetophenonethiosemicarbazone halides is measured at 25-degrees-C in methanol-water mixture (32.63 < D < 73.42). The conductance parameters derived from the Fuoss-Onsager conductance theory indicate that the solvation of halides decreases with the decrease of the dielectric constants until a certain minimum and then increases again. The plot of log K(A) vs. 1/D is found to be non-linear indicating that the equation of association cannot be applied. The association constant is analysed using the solvent separated-ion pair model.