Behaviour of Some Copper(I) and Cobalt(III) Complexes in Acetonitrile and <i>n</i>-Butyronitrile at 298.15K

Abstract

Abstract Molar conductances of a large number of copper(I) and cobalt(III) complexes, behaving as strong 1:1 electrolytes, have been measured in acetonitrile (AN) and n -butyronitrile ( n -BTN) at 298.15K. The conductance data have been analyzed by the Shedlovsky method to evaluate Λ 0 and K A values of these electrolytes. Limiting ion conductances (λ i 0 ) for various ions in AN have been calculated by using transference number data. In n -BTN, where no transference number data is available, such values have been calculated by an indirect method using Bu 4 NBPh 4 as a reference electrolyte. The actual ionic radii ( r i ) for various ions in solution have been calculated using a modified form of Stokes’ law. The ionic radii ( r i ) for various complex ions have been compared with the ionic radii of two reference ions, Bu 4 N + and Ph 4 B − , which are not solvated in dipolar aprotic solvents, to throw light on the solvation behaviour of these complex ions.