CONCENTRATED ELECTROLYTE-SOLUTIONS IN ORGANIC-SOLVENTS - THEIR SPECIFIC CONDUCTANCE AND ANALYSIS OF CASTEEL-AMIS EQUATION

The specific conductance of concentrated solutions was measured for the following systems: LiAsF6 solutions in an equimolar acetonitrile and propylene carbonate mixture at 25-degrees-C; LiAsF6 solutions in an equimolar gamma-butyrolactone and tetrahydrofuran mixture at 25 and 15-degrees-C; LiClO4 solutions in an equimolar gamma-butyrolactone and tetrahydrofuran mixture at 25-degrees-C; LiAsF6 and LiClO4 solutions in an equimolar gamma-butyrolactone and 2-methyl-tetrahydrofuran mixture at 15 and 25-degrees-C; LiClO4 solutions in an approximately equimolar gamma-butyrolactone and 1,3-dioxolane mixture at 25-degrees-C. The conductance data for these systems were analysed in terms of the semi-empirical Casteel-Amis equation. The equation parameters c(max), kappa(max), a and b were evaluated. The properties of the solvents (electrical permittivity and viscosity) were measured. The solvent molecule minimized energies were calculated using the ALCHEMY program.