Conductance studies of 1-1 electrolytes in N,N-dimethylformamide at various temperatures

Abstract

Conductance data for NaNO₃, KI, Pr₄NBr and Bu₄NI in N,N-dimethylformamide (DMF) at − 40, − 35, − 25, − 15, − 5, 5, 15, 25, 35 and 45°C are reported. The data have been analysed by the Lee–Wheaton conductance equation in terms of the limiting molar conductance (Λ₀) and association constant (K_A). Evaluation of single ionic conductances has been carried out on these data and on preceding experimental conductance data for MBr (M = Na⁺, K⁺, Cs⁺, NH₄⁺, Et₄N⁺, Pr₄N⁺, Ph₄P⁺), KClO₄, NaBPh₄ , Ph₄PCl and Bu₄NBPh₄ using the Walden product of Bu₄N⁺. The temperature dependences of Λ₀ and K_A are discussed. The values of K_A indicate that all these salts are weakly associated in DMF.