Abstract
The various complexes stability constants (SCs) of Cu(II) with Venlafaxine hydrochloride (V) has been determined using a potentiometric titration technique as primary ligand. While the secondary ligands was symbolized by (L) referring to selected amino acids, the two were under experimental conditions (25 degrees C and ionic strength 0.1 mol/L NaNO3). The complexes containing mixed ligand ternary were occurring with each other generally in most cases at high pH with binary complexes progressively deviation of particular metal complexes. Comparative stabilities of Ternary Complexes were equated with those of the corresponding binary complexes in terms of Delta log K and % RS values. Moreover, the complexes concentrations were evaluated in its distribution.