Complexes of Co (II), Ni (II), Cu (II), Cd (II), Zn (II) and U (IV) O2 with (Z)-2-oxo-2-(2-(2- oxoindolin-3-ylidene) hydrazinyl)-N-phenylacetamide (H2OI) are reported and have been characterized by various spectroscopic techniques like (IR, UV–Vis, ESR 1H and 13C NMR) as well as magnetic and thermal (TG and DTA) measurements. It is found that the ligand behaves as a neutral tridentate, neutral tetradentate, monoanionic tridentate, monoanionic ...
