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.