title: Synthesis, characterization and electrochemical study of synthesis of a new Schiff base (H₂cddi(t)butsalen) ligand and their two asymmetric Schiff base complexes of Ni(II) and Cu(II) with NN'OS coordination spheres.
abstract: A novel Schiff base (H(2)cddi(t)butsalen) ligand was prepared via condensation of Methyl-2-{N-(2'-aminoethane)}-amino-1-cyclopentenedithiocarboxylate(Hcden) and 3,5-di-tert-butyl-2-hydroxybenzaldehyde. The ligand and Ni(II) and Cu(II) complexes were characterized based on elemental analysis, IR, (1)H NMR, (13)C NMR, UV-Vis spectrometry and cyclic voltammetry. The structure of copper{methyl-2-{N-[2-(3,5-di-tert-butyl-2-hydroxyphenyl)methylidynenitrilo]ethyl}amino-1-cyclopentedithiocarboxylate has been determined by X-ray crystallography. The X-ray results confirm that the geometry of the complex is slightly distorted square-planar structure. The copper(II) ion coordinates to two nitrogen atoms from the imine moiety of the ligand, a sulfur atom the methyl dithiocarboxylate moiety and phenolic oxygen atom.
authors.affiliation: Department of Chemistry, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran. saiedmenati@gmail.com
authors.forename: Saeid
authors.initials: S
authors.lastname: Menati
authors.forename: Azadeh
authors.initials: A
authors.lastname: Azadbakht
authors.forename: Abbas
authors.initials: A
authors.lastname: Taeb
authors.forename: Ali
authors.initials: A
authors.lastname: Kakanejadifard
authors.forename: Hamid Reza
authors.initials: HR
authors.lastname: Khavasi
mesh_terms: D056831:Coordination Complexes / Q000138:chemical synthesis* / Q000737:chemistry; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D055664:Electrochemical Techniques; D004566:Electrodes; D004583:Electrons; D005029:Ethylenediamines / Q000138:chemical synthesis* / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D009532:Nickel / Q000737:chemistry*; D009584:Nitrogen / Q000737:chemistry; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry; D012545:Schiff Bases / Q000138:chemical synthesis* / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013455:Sulfur / Q000737:chemistry
chemical_list: D056831:Coordination Complexes; D005029:Ethylenediamines; D008024:Ligands; D012545:Schiff Bases; D013455:Sulfur; D003300:Copper; D009532:Nickel; C011452:disalicylaldehyde ethylenediamine; D009584:Nitrogen; D010100:Oxygen