Preparation and Characterization of some Transition Metal Complexes with di -2- Quinolinone Dibenzylidine Ligand and their Adducts with 1,10 – Phenanthroline

Abstract

The present work includes the preparation with complexes of the general formula [M2L2] Cl4 and [M2L2(1,10-phen)2] Cl4 were M= Mn (II), Fe (II), Co (II), Ni (II), Cu (II) and Zn (II) L = di -2- quinolinone dibenzylidine 1,10-phen = 1,10phenanthroline The ligand was prepared by condensation reaction of N-aminoquinoline-2-one with terphaldehyde (2:1) and characterized by infrared and proton NMR. The complexes number (1-6) prepared into (2:2) (M: L) molar ratio respectively while complex number (7-12) prepared into (2:2:2) (M: L: 1,10–phen) molar ratio respectively. The I.R spectra data suggest the involvement of nitrogen atom of azomethine group and oxygen atom of carbonyl group of the ligand in coordination to central metal ion. The synthesized complexes were characterized by elemental analysis, molar conductance, magnetic susceptibility, and spectral measurements (UV – Vis, IR). Elemental analysis data proposed 2:2 (metal: ligand) and 2:2:2 (1,10-phen). The molar conductance measurements showed 1:4 electrolytes complexes, Further more magnetic moment measurements and electronic spectra indicated that the complexes of the type [M2L2] Cl4 possess a tetrahedral geometry while complexes of the type [M2L2(1,10-phen)2] Cl4 possess an octahedral geometry.