J. Chakraborty, B. Das
Feb 1, 2004
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0
Influential Citations
32
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Journal
Zeitschrift für Physikalische Chemie
Abstract
Abstract The electrical conductances and viscosities of the solutions of tetrabutylammonium thiocyanate (Bu4NCNS) in acetonitrile have been reported at 25, 30, 35, 40 and 45 °C. The conductance data have been analyzed by the 1978 Fuoss conductance-concentration equation in terms of the limiting molar conductance (Λ0), the association constant (KΛ) and the association diameter (R). The viscosity data have been analyzed by the Jones–Dole equation for the associated electrolytes to evaluate the viscosity B-coefficients of the electrolyte. These data have also been analyzed by the transition-state treatment to obtain the contribution of the solutes to the free energy of activation for viscous flow of the solution. The ionic contributions to the limiting molar conductance (Λ0), the viscosity B-coefficient and the free energy of activation for viscous flow have been estimated using the “reference electrolyte” tetrabutylammonium tetraphenylborate (Bu4NBPh4). Slight ionic association was always found for this salt in this solvent medium. The tetrabutylammonium ion is found to be unsolvated whereas the thiocyanate ion undergoes solvation in acetonitrile in the temperature range investigated here.