Solution equilibria in aqueous M^II-N-(2-hydroxy-4-nitro)-benzylglycine systems. Part II. 1∶2 Copper-ligand mixture

Summary

Equilibrium studies of Cu^II ions and (2-hydroxy-4-nitro)benzylglycine by pH titrations [25 °C; I=0.1 (NaClO₄)] indicate the existence of the species CuHL⁺, CuH₂L₂, CuHL ⁻₂ and CuL ²⁻₂ in 1∶2 metal : ligand mixtures in aqueous solution. The stoichiometric equilibrium constants corresponding to various reactions have been evaluated by suitable adaptations and modifications of the algebraic method, while first neglecting and then considering the contribution of hydrolytic reactions of Cu^II. A treatment has also been worked out for the determination of the distribution of Cu^II ions among the various species.