TRANSPORT BEHAVIOR OF IONS IN N,N-DIMETHYLFORMAMIDE AND DIMETHYL-SULFOXIDE AT DIFFERENT TEMPERATURES - CONDUCTANCE STUDIES

Molar conductivities of Bu(4)NBPh(4), BuNNO(3), LiNO3, NaNO3, KNO3 and AgNO3 have been reported in pure DMF and DMSO in the temperature rang e from 20 to 45 degrees C. The conductance data have been analyzed in terms of limiting molar conductivity Lambda(0) and ion-association con stant K-A. Separation of Lambda(0) into ionic components lambda(i)(0) has been carried out on the basis of Bu(4)NBPh(4) assumption in order to calculate the effective ionic radii r(i) in DMF and DMSO. Examinati on of r(i) values of K+ and Ag+ ions as a function of temperature reve aled some specific interactions of Ag+ ion with DMF and DMSO. In DMSO electrostatic ion-dipole interaction of Li+, Na+ and K+ ions is found to be somewhat modified due to dipole-dipole interaction.