Conductometric studies of some tetraalkylammonium salts in binary mixtures of dimethylsulphoxide and dioxane at 35 and 45°C

Abstract

<span style="font-size:11.0pt;line-height:115%; font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:"times="" roman";mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">Molar conductances of Bu₄NBPh₄, Bu₄NI, Bu₄NBr, Pr₄NBr, Et₄NBr, NaBPh₄ and Nal have been measured in the concentration range (0-50) x 10^-4 mol dm^-3 in dimethyl-sulphoxide (DMSO) + dioxane mixtures containing 90, 75, 60 and 45 mol% DMSO at 35 and 45°C. The entire conductance data have been analysed and the limiting molar conductance values for various electrolytes have been obtained. The limiting ionic conductance (<i>λ</i>_i) has been evaluated to calculate the solvated radii <i>(r</i>_i<i>) </i>and the ionic Walden product (<i>λ</i>_i<i> ŋ</i>₀<i>) </i>at 35 and 45°C. The variation of ionic Walden product and solvated radii has been examined as a function of solvent composition and temperature to throw light on the solvation behaviour of these large tetraalkylammonium ions.</span>