Temperature dependence of transport properties and ion-molecular forms of LiAsF6 in γ-butyrolactone

The solvation and association electrolyte interactions are analyzed in the concentration range of 02 m at temperatures of 253.15-313.15 K using measurements of the conductivity and viscosity of LiAsF6 solutions in gamma-butyrolactone (gamma-BL). Concentrated LiAsF6 solutions in gamma-BL are considered as molten electrolytic solvates, whose transport processes are considerably influenced by a cooperative restructuring of the system. The concentration dependence of the molar conductivity is linear in the lambda vs. c(1/3) coordinates, which agrees with a theory of quasi-crystalline electrolyte lattice in solution. The Lee-Wheaton model is used to determine the limiting molar conductivities, distance parameters, and association constants and their temperature dependences. The size of solvate spheres increases with decreasing temperature and their overlapping occurs at lower concentrations.