COPPER(II), NICKEL(II), OXOVANADIUM(IV) AND DIOXOURANIUM(VI) COMPLEXES OF NOVEL ASYMMETRIC TETRADENTATE SCHIFF BASE LIGANDS DERIVED FROM 6-METHYL-3-FORMYL-4-HYDROXY-2-(1H)-QUINOLONE .4.

摘要

The novel, half-unit ligand obtained by the single condensation of 6-methyl-3-formyl-4-hydroxy-2-(1H)-quinolone and p-phenylenediamine, was condensed with either acetylacetone or salicylaldehyde to yield novel, asymmetric tetradentate Schiff base ligands, H(2)L(a) and H(2)L(b), respectively. The reactions of the ligands with Cu2+, Ni2+, VO2+ and UO22+ salts yielded complexes of the general formula [L(2)M(2)]nH(2)O, except that of the uranyl complex of the ligand H(2)L(a) which has the formula [L(a)(UO2)(2)(OAc)(2)(OH2)(2)] The ligands and metal complexes were characterized by elemental analyses IR, UV-visible, mass and ESR spectra and magnetic measurements. The Cu2+ complexes are distored tetrahedral, the Ni2+ complexes are octahedral. [References: 19]