A NOVEL TYPE HALF-UNIT SCHIFF-BASE LIGAND, YLIMINOMETHYL]-4-HYDROXY-6-METHYL-2-(1H)-QUINOLONE AND ITS METAL-COMPLEXES .4.

A novel half-unit Schiff base ligand derived from 6-methyl-3-formyl-4- hydroxy-2-(1H)quinolone and o-phenylenediamine was prepared. The Schif f base acts as a monobasic ligand. Metal complexes of the type [MLX](2 ), M = Cu(II), Ni(II) or Fe(III); X = Cl or OAc were obtained by the r eaction of metal acetates or chlorides with the ligand, with the ligan d behaving as a terdentate. However, the reaction of M(ClO4)(2) . 6H(2 )O, M = Cu(II) or Ni(II), VOSO4 and UO2(OAc)(2) . 2H(2)O with the liga nd, yielded complexes of the type [ML2], where the ligand behaves as a bidentate. The ligand and its metal complexes were characterized by e lemental analyses, UV-visible, IR and mass spectra. Also, magnetic sus ceptibilities of the metal complexes were determined.