The Influence of a Water-Acetone Solvent on the Stability of Nickel(II) Complexes with Glycylglycine

摘要

The stability constants of nickel(II) complexes with glycylglycine in water-acetone mixtures (mole fraction of acetone X = 0-0.40) were determined by potentiometric titration at 298 K and an ionic strength of 0.1 M (NaClO4). With an increase in the content of the organic cosolvent, nickel(II) glycylglycinates become more stable, mainly because of the better coordination of the ligand through the carboxy group.