Indirect polarographic determination of stability constants. II. Pyridine complexes

Abstract

Polarograms of cadmium at different concentrations of pyridine were taken in 0·5 M potassium nitrate medium. From a plot of the half-wave potentialvs. log (Py), the co-ordination numbers of the complexes were calculated to be one and two. The indirect method was applied to the study of cobalt complexes of pyridine. From the shift in the half-wave potentials of cadmium in the presence of cobalt, a plot of n̅ vs. pA was obtained which indicated the presence of higher complexes of cobalt and pyridine. The stability constants were calculated.