Thermodynamic Stability of Zn(II) Complexes with Some amino Acids and Pyridoxine (Vit. B5)

Abstract

Stability constant (log B) and thermodynamic parameters such
as enthalpy change (ΔH), free energy change (ΔG) and entropy
change (ΔS) of Zn(II) complexes, with L-Iysine, L-ornithine,
L-threonine, L-serine, L-phenylglycine, L-phenylalanine,
L-glutamic acid and L-aspartic acid as primary ligand and
pyridoxine (Vit B₅) as secondary ligand, were calculated by applied
polarographic method, at pH = 8.50 ± 0.01 and ionic strength
μ= 1.0 NaCIO at 25°C.