Metal Chelates of Cerium(III), Thorium(IV), and Dioxouranium(VI); Complexes with Some Derivatives of Aryl Schiff Bases

Abstract

New Ce(III), Th(IV) and U(VI) complexes with the aryl Schiff bases 2‐hydroxybenzylamine‐2′‐hydroxybenzylidene (HL1), ‐2′‐hydroxynaphthylidene (HL2), ‐2′‐hydroxy‐5′‐bromobenzylidene (HL3), ‐2′‐hydroxy‐5′‐chlorobenzylidene (HL4), 2′‐hydroxy‐3′,5′‐dichlorobenzylidene (HL5) and 2′‐hydroxy‐3‐methoxybenzylidene (HL6) have been synthesized and characterized by elemental and thermal analyses, molar conductance, magnetic susceptibility, IR, 1H NMR and electronic spectra. Elemental analyses along with conductometric titrations showed the formation of 1:1 and 1:2 (M:L) complexes while IR, molar conductance and 1H NMR data proved that these ligands act as monobasic, tridentates for the 1:1 and monobasic, bidentates for the 1:2 complexes with a coordination number of eight in both.