SYNTHESIS AND CHARACTERIZATION OF SOME MIXED-LIGAND COMPLEXES OF THORIUM(IV) AND DIOXOURANIUM(VI) WITH 4-BENZOYL-3-METHYL-1-PHENYLPYRAZOLE-5-ONE AND DIFFERENT ANIONS

A series of 16 mixed ligand complexes of Th(IV) and UO2(VI) with 4-benzoyl-3-methyl-1-phenylpyrazol-5-one (BMPP) and different anions such as nitrate, sulphate, thiocyanate, thiosulphate, acetate, propionate, malonate and oxalate have been synthesized and characterized on the basis of elemental analysis, molecular weight, molar conductance and IR spectral data. These complexes have the general formulae [Th(BMPP)2(AA)2], [UO2(BMPP)2(AA)], [Th(BMPP)2(A)4] and (UO2(BMPP)2(A)2], where AA = divalent anions and A = monovalent anions. In these complexes BMPP acts as a neutral bidentate ligand bonding through both the carbonyl groups, the monovalent anions, viz., nitrate, thiocyanate, acetate and propionate act as unidentate ligands, and the divalent anions, viz., sulphate, thiosulphate, malonate, and oxalate act as bidentate ligands.