Conductivity Properties of Some Tetraalkylammonium Iodides in the Water+N,N-Dimethylformamide Mixtures at 298.15 K

Abstract

Conductance measurements are reported for iodides of tetramethylammonium (Me₄NI), teraethylammonium (Et₄NI), tetrapropylammonium (Pr₄NI), tetrabutylammonium (Bu₄NI), and tetrahexylammonium (Hex₄NI), in the water+N,N-dimethylformamide (DMF) mixtures over the whole composition range, except for Me₄NI and Hex₄NI, where the composition range are 0-50 mol% and 50-100 mol% of DMF, respectively, at 298.15 K. The data obtained have been analyzed by the Fuoss-Justice equation, in terms of the limiting molar conductances (Δ₀), the Walden products (Δ₀η) and the association constant (K_A). Variation in the Walden products with solvent composition are briefly discussed. The results obtained here were also compared with the literature data.

Key Words:

• Conductances
• solution of tetraalkylammonium salts
• mixtures of water with N,N-dimethylformamide
• walden products