Potentiometric Investigation of Simple and Mixed Complexes of Cupric Ion in Aqueous Solution.

Simple and mixed complexes of copper(II) with 2,2′-dipyridyl and oxydiacetic or thiodiacetic acid have been tnvestigated at 25 δC in 0.1 M (NaClO 4) by potentiometric measurements Stabiliy constants for the systems CuL, CuL 2, CuHL, Cu(dip)L, Cu- (dip)HL (where L is oxydiacetic or thiodiacetic acid and dip is 2,2′-dipyridyl) have been determined. Some considerations about the stability of these complexes are reported