XPS EVIDENCE FOR THE ORDER IN STABILITIES OF<i>N</i>,<i>N</i>,<i>O</i>-TERDENTATE COMPLEXES OF 2-(2-PYRIDYLAZO)PHENOLIC LIGAND WITH THE DIVALENT METALS
The core electron bindingenergies of N(ls) and O(ls) in the eight complexes of an N,N,O-terdentate ligand, 5-dimethylamino-2-(2-pyridylazo)phenol, with divalent transitionmetals were measured by means of X-ray photoelectron spectroscopy (XPS). The results indicate that the thermodynamic stabilities of the N,N,O-terdentate chelates are controlled by the extent of the electron localization between