Conductance and viscosity measurements of tetrabutylammonium tetraphenylboride in non-aqueous solvents at 25 °C

Abstract

The equivalent conductance and viscosity of tetrabutylammonium tetraphenylboride (Bu₄NBPh₄) have been measured in a large number of non-aqueous solvents at 25 °C and the data in all cases have been analysed by the Shedlovsky and Jones–Dole equations, respectively. The experimental Λ₀ value of Bu₄NBPh₄ obtained from the conductance data in each solvent has been compared with the corresponding value obtained by adding together the ionic conductances of Bu₄N⁺ and Ph₄B^–, which have been theoretically calculated using an equation proposed by Gill. The agreement between these two sets of Λ₀ values is good.

The viscosity A coefficient of the Jones–Dole equation for Bu₄NBPh₄ in each case is positive and is in good agreement with the limiting theoretical value calculated using the Falkenhagen–Vernon equation. The viscosity B coefficient is also positive and large in each case. The B₊ and B_– coefficients for Bu₄N⁺ and Ph₄B^– have been calculated employing a method proposed in our previous paper and a justification based on conductance results has also been given for this method of separation.