Complex Formation of Nickel(II) and Copper(II) with Barbituric Acid
Figure 3
Species distribution curves of the metal ion Ni(II) and the BA as a function of pH, for a solution initially containing M metal ion and M BA. °C and MKNO3. % a is the percentage of a species present, with the concentration of the metal set at 100%; NiL, NiL2, and NiL3H are the complexed species with one, two, and three ligand molecules.