Studies on Some Metal Chelates of 8-Hydroxy-Quinoline-5-Sulphonylhydrazide

Abstract

Cu(II), Zn(II), Cd(II), Pb(II) and UO₂(II) complexes of 8-hydroxyquinoline-5-sulphonylhydrazide (QSH) have been investigated. The formation, stoichiometry and stability of the complexes have been tested in solution using electronic spectral measurements and conductometric titrations. Characterization of the isolated solid complexes has been performed on the basis of elemental analysis, electronic and IR spectral data as well as polarographic measurements. It is concluded that the ligand acts as a monobasic ON bidentate ligand. The different bands observed in the electronic spectra of the ethanolic solution of the complexes have been assigned to the L + MCT and d-d electronic transitions.