TEMPERATURE AND SOLVENT EFFECTS ON VISCOSITY-B COEFFICIENTS - MONOVALENT IONS IN ACETONITRILE AT 15-DEGREES-C, 25-DEGREES-C, AND 35-DEGREES-C

The viscosity B coefficients were measured for LiI, NaI, KI, NaBPh4, and Bu4NBPh4 in acetonitrile at 15, 25, and 35°C, and they were divided into the ionic components by using the reference electrolyte Bu4NBPh4. The ionic B coefficients were positive for all the monovalent ions studied at each temperature in this dipolar aprotic solvent. The temperature coefficients of the B values were quite small as in other nonaqueous solvents. The experimental results were compared with the values predicted by the dielectric friction theory to clarify the effect of ionic charge. The charge effect is examined also by correlating the ionic B coefficient with the dielectric constant of solvent. © 1990 American Chemical Society.