Metal Chelates of o-Phenylenediaminb bis-Isatin Schiff Base with La(III), Ce(III), Th(IV), UO2(II), Ag(I) AND Hg(II)

摘要

A series of La(III), Ce(III), Th(IV), Uo2(II), Ag(I) and Hg(II) chelates with the Schiff base derived from isatin with o-phenylenediamine have been prepared and characterized by elemental analyses,1H NMR, IR, UV-visible spectra and molar conductivity measurements. Analytical and other spectroscopic studies revealed that the Schiff base ligand reacts with the metal ions in 1:1 (metal : ligand) stoichiometry as dibasic tetradentate ligand through its ONNO ligating atoms. A non-electrolytic nature is suggested for these chelates except for that of Ag(I).