4-Aminoantipyrine schiff-base complexes of lanthanide and uranyl ions

Abstract

Using a new tridentate ligand, acetylacetone-4-aminoantipyrine (AAP) complexes of lanthanide nitrates having the general formula [Ln(AAP) 2](NO 3) 3 (where Ln = Pr, Nd, Sm, Gd, Dy or Y) have been prepared. Uranyl complexes of salicylaldehyde-4-aminoantipyrine (SAAP) of general formulae [UO 2(SAAP) 2](X) 2 (where X = NO 3 or I) and [UO 2(SAAP) 2(OAc) 2] have also been prepared. The complexes have been characterized by IR, electronic, NMR, conductivity and analytical techniques. While SAAP acts as bidentate ligand without using its hydroxyl group, AAP acts as tridentate ligand involving hydroxyl coordination. The covalency parameter δ has been calculated for the Pr and Nd complexes.