Abstract
The conductivities of five 1:1 electrolytes have been measured in mixtures of dimethoxyethane with propylene carbonate and 4-butyrolactone. As in previous studies involving mixed ethereal solvents, a maximum in the molar conductances is found for a specific solvent mixture. From consideration of single ion mobilities, Stokes' radii, and the Bjerrum treatment of ion association, we conclude that while small cations are highly coordinated by dimethoxyethane which promotes the formation of solvent-separated ion pairs, a significant number of contact ion pairs exist. Conductivity data for tetraalkylammonium chlorides suggest that these salts form both ion pairs and higher (neutral) aggregates such as a quadrupoles.
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