Synthesis and Characterization of Homo Binuclear Complexes of UO2(VI), Th(IV), ZrO(IV) and VO(IV) with Polyaza Macrocyclic Schiff-Bases

The synthesis and characterization of homo binuclear complexes with some Schiff base monohydrazone derivatives obtained from the reaction of thiocarbohydrazide, benzilmonohydrazone/diacetylmonohydrazone and acetylacetone in presence of UO22+, ZrO2+, Th4+ and VO2+ ions were reported. An ethanolic solution of hydrated UO2(VI)/Th(IV)/ZrO(IV) nitrates/vanadyl sulphate was added to a hot ethanolic solution of the mixture of thiocarbohydrazide. The resulting mixture was refluxed on a water bath for 2-3 hours during which a coloured complex was precipitated out in each case. The ethanolic suspension of the above complexes were treated with acetylacetone and thiocarbohydrazide followed by the addition of corresponding metal salt. The results show that the complexes are highly colored and insoluble in water and common organic solvents such as ethanol, methanol, acetone, CCl4, CHCl3, benzene and ether but moderately soluble in highly coordinating solvents such as DMF and DMSO.