Stability of ternary complexes of N-salicylideneaminio acid and ATP with Cu(II)
Chunli Liu, Lin Rui-Sen · Chemical Research and Application · 2006
The stability constants of ternary complexes of N-Salicylideneaminio acid and ATP with Cu(Ⅱ)at 15℃,25℃,and 35℃ were determined by pH method.The linear free energy relationship(LFER)exists nicely between lgk and pk_2 of N-Salicylideneaminio acid at the same temperature.The stability of both binary complexes and ternary complexes decreased with the increasing of temperature,but the effects of temperature on binary complexes were greater than on ternary complexes.The hydrophobic interaction and aromatic-ring stacking effects between ligands in the ternary complexes were studied.It has been found that the increasing of entropy is the major reason for both hydrophobic interaction and aromatic-ring stacking effect.