Synthesis and Characterization of SM (III), Ce (III), Ni (II) AND Cu (II) Dinuclear Complexes Derived from Terephthaldehyde

Abstract

A new ligands  (H₂L₁, H₂L₂) and Theirs Binuclear  complexes with (SmIII ,CeIII, NiII and CuII  ). Both ligands _ prepare in two steps, the first step dissolution  of terephthaldehyde in methanol and reacted under refluxe with O- phenylen diamine  to give N¹,N^1,-(1,4-Phenylenebis (methanylylidene) bis(benzene-1,2-diamine)  which reacted in the second step with  O-Vanillin to give the ligand6,6^,-((1E,1^,E)-((((1,4-Phenylenebis (methanylylidene)) bis(azanylylidene)) bis(2,1- phenylene) ) bis(azanylylidene  bis(methanylylidene)  bis(2- meth oxyphenol) (H₂L₁) and reacted with 2-Hydroxy-1- naphthaldehyde to give the ligand  1,1^,-((1E)-((((1,4-phenylenebis (methanylylidene)) bis(azanylylidene)) bis (2,1- phenylene)) bis(azanylylidene))bis(methanylylidene)bis(naphthalene-2-ol (H₂L₂ ).The four complexes manufacture by immediate reaction of the ligands with appropriate metal chloride. The ligands and Theirs  complexes were characterize by spectroscopic methods ,Elemental Analysis (C.H.N),Infrared Spectroscopy (FT-I.R), Nuclear Magnetic Resonance Spectroscopy (¹H-NMR),  Mass Spectra , Magnetic sensitivity and Molar conductivity .  The data of these measurements suggest a Sequare planer geometry for (CuII , NiII) ,  Monocapped octahedron for Ce III and Sm III  complexes .

Keywords: Binuclear complexes, Terephthaldehyde, Schiff base, Inner-transition metals.