Formulation of Stokes’ Radii in DMF, DMSO and Propylene Carbonate with Solvent Structure Cavity Size as Parameter
- 1 August 1975
- journal article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 48 (8) , 2253-2257
- https://doi.org/10.1246/bcsj.48.2253
Abstract
Conductance of univalent ions in DMSO (dimethyl sulfoxide), DMF (dimethylformamide) and PC (propylene carbonate) was determined by use of tetrabutylammonium-tetrabutylborate as standard electrolyte of equal cationic and anionic conductance. Empirical formulation of Stokes’ radius was attempted on the assumption of a structure-cavity affecting the ionic transport in a medium of aprotic and polar solvent as well as water. By application of classical fluid dynamics Stokes’ radius rs is given in terms of −(2⁄3)rc+(1⁄σs) (rc–ro)2, where rc is crystal ionic radius, ro and σs are parameters characteristic of the cavity and molecular sizes, respectively, with respect the solvent.This publication has 10 references indexed in Scilit:
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