Electric conductances of tributylammonium (n-Bu3NH') or diethylcyclohexylammonium (EtzN(C6HII)H+) halides (chloride, bromide, and iodide) were measured in benzonitrile at 15, 25, 35, and 45 OC. Observed molar conductivities (NS cm2 mol-') for (0.4-6.0) x mol dm-3 of the salts were analyzed by our method. The ion pair and the "symmetrical" triple ion formation constants of the trialkylammonium chlorides (R3NHC1) decreased (instead of decreasing permittivity) with increasing temperature. Constant values of Walden products (Aoq) of the ions over temperature changes suggested a constant solvation ability of the solvent within the temperature range. The temperature dependency of the formation constants for the bromides (R3NHBr) was smaller than that for the chlorides. The formation constants for the iodides (R3NHI) were almost independent of temperature. Thermodynamic parameters (AGO, AIT, and AS") for the ion pair and triple ion formation constants of the six salts were evaluated.

It is well known that acetic and benzoic acids (HA) form dimers (H2A2) in very low permittivity solvents, such as benzene or chloroform. In high permittivity media, however, higher association (above the ion-pair) between uni-univalent electrolytes has been hardly believed to occur. In a series of studiesl, by means of polarography, spectrophotometry, and conductometry, we have demonstrated the formation of higher ion aggregates, e.g., triple ions (M2X+, MX2-) and quadrupoles (M2X2) from 1:1 electrolytes (MX) in relatively high permittivity media (20

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