CONDUCTIVITY PROPERTIES OF SOME TETRAALKYLAMMONIUM IODIDES IN THE WATER PLUS N,N-DIMETHYLFORMAMIDE MIXTURES AT 298.15 K

Conductance measurements are reported for iodides of tetramethylammoni um (Me4NI), teraethylammonium (Et4NI), tetrapropylammonium (Pr4NI), te trabutylammonium (Bu4NI), and tetrahexylammonium (Hex(4)NI), in the wa ter + N,N-dimethylformamide (DMF) mixtures over the whole composition range, except for Me4NI and He4NI, where the composition range are 0-5 0 mol% and 50-100 mol% of DMF, respectively, at 298.15 K. The data obt ained have been analyzed by the Fuoss-Justice equation, in terms of th e limiting molar conductances (Lambda(0)), the Walden products (Lambda (0) eta) and the association constant (K-A) Variation in the Walden pr oducts with solvent composition are briefly discussed. The results obt ained here were also compared with the literature data.