STUDY OF SIMPLE AND MIXED-LIGAND COMPLEXES OF COPPER IONS WITH SOME AMINO-ACIDS AND SUCCINATE ANIONS BY DIFFERENTIAL PULSE POLAROGRAPHY .2.

The formation of binary and ternary complexes of some amino-acids (asp artic acid, glutamic acid and lysine) and succinate with Cu(II) have b een investigated using differential pulse (d.p.) polarography. The res ults reveal the formation of one ternary complex with 1:1:1 stoichiome try. The reduction processes of all the systems were reversible and di ffusion controlled. The formation constants of binary and ternary syst ems have been calculated. The mixed ligand stability constants were ca lculated statistically and compared with the observed values. The mixi ng, stabilization and disproportionation constants of the mixed specie s are also given.