Ion pair association constant of diammine bis-1-amidino-O-methylurea cobalt(III) monochloride in acetonitrile-water mixture at different temperatures -A conductance study

摘要

Conductances of diammine bis-l-amidino-O-methylurea cobalt (III) monochloride have been measured in various water (W) + acetonitrile (AN) mixtures at 283.15, 288.15. 293.15, 298.15 and 303.15K. The conductance data in all the cases have been analysed by Shedlovsky equation to obtain #LAMBDA#_o and K_A value for the electrolyte. The influence of the mixed solvent composition on the solvation of ions has been discussed based on the composition dependence of the Walden product. Based on the K_A values and temperature dependence of #LAMBDA#_o . the thermodynamic parameters and Arrhenius activation energy (E~s) of transport processes have been determined. The results have been discussed in terms of ion- ion, ion-solvent and solvent-solvent interactions.