Thermodynamic considerations in co-ordination. Part XXV. Formation of ternary complexes containing two dissimilar metal ions and the implication for metal–metal stimulation phenomena in viva
Potentiometric studies are reported for calcium(II), lanthanum(III), and zinc(II) binary complexes and for calcium(II) and zinc(II) or lanthanum(III) and zinc(II) ternary complexes of glutathionate at 37 °C and 0.15 10–3 mol dm–3(Na+)[ClO4]. Formation constants have been computed and used to calculate the concentrations of the complexes at various pH. Both calcium and lanthanum ions encourage the formation of neutral membrane-permeable complexes of zinc ions and the systems are used to discuss the principles of metal–metal stimulation phenomena in viva.