Synthesis and Characterization of Some Mixed Ligand Complexes of Thorium(IV) and ioxouranium(VI) with 1-Carbamido-3-Methylpyrazol-5-One and Various Anions

Abstract

A series of 10 mixed ligand complexes of two actinide metal ions, viz., Th(IV) and UO₂(VI) with 1-carbamido-3-methylpyrazol-5-one (CMP) and various anions such as nitrate, acetate, thiocyanate, oxalate and sulphate have been synthesised and characterized
on the basis of elemental analysis, molecular mass, molar
conductance, IR spectra, TG and DTG data. These complexes
have the general formulae [(Th(CMP)₂(a)₄)], [(Th(CMP)₂(aa)₂)],
[(UO₂(CMP)₂(a)₂)] and [(UO₂(CMP)₂(aa))], where a = monovalent
anions such as acetate, nitrate and thiocyanate and aa = divalent
anions such as oxalate and sulphate. In these complexes, CMP acts
as a neutral bidentate ligand, the anions such as acetate, nitrate and
thiocyanate act as monovalent unidentate ligands, and the anions
such as oxalate and sulphate act as divalent bidentate ligands.