title: Synthesis, characterization and structural determination of some nickel(II) complexes containing imido Schiff bases and substituted phosphine ligands.
abstract: Some new tridentate ONN Schiff base complexes of [NiL(PR3)] (where L=Salicylidene2-amino4-nitrobenzene (L(1)), 5-BrSalicylidene2-amino4-nitrobenzene (L(2)), 5-NO2Salicylidene2-amino4-nitrobenzene (L(3)), 5-MeOSalicylidene2-amino4-nitrobenzene (L(4)) and 3-MeOSalicylidene2-amino4-nitrobenzene (L(5)), R=Bu and Ph (with L(1))) were synthesised and characterized by IR, UV-Vis, (1)H NMR spectroscopy and elemental analysis. The geometry of [NiL(1)(PPh3)] was determined by X-ray crystallography. It indicated that the complex had a planar structure and four coordinates in the solid state. The thermogravimetry (TG) and differential thermoanalysis (DTA) of the synthesized complexes were carried out in the range of 20-600°C, leading to the decomposition of L(1)-L(3) type in three stages and of L(4)-L(5) and [NiL(1)(PPh3)] type in four stages. Thermal decomposition of the complexes was closely the dependent upon the nature of the Schiff base ligands and proceeded via the first order kinetics.
authors.affiliation: Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran. akianfar@cc.iut.ac.ir
authors.forename: Ali Hossein
authors.initials: AH
authors.lastname: Kianfar
authors.forename: Mostafa
authors.initials: M
authors.lastname: Ebrahimi
mesh_terms: D056831:Coordination Complexes / Q000138:chemical synthesis* / Q000737:chemistry*; D018360:Crystallography, X-Ray; D004055:Differential Thermal Analysis; D004583:Electrons; D007094:Imides / Q000737:chemistry*; D007700:Kinetics; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D009532:Nickel / Q000737:chemistry*; D010720:Phosphines / Q000737:chemistry*; D012545:Schiff Bases / Q000138:chemical synthesis* / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013818:Thermogravimetry
chemical_list: D056831:Coordination Complexes; D007094:Imides; D008024:Ligands; D010720:Phosphines; D012545:Schiff Bases; D009532:Nickel; C044646:phosphine
keywords: Nickel complexes; Phosphine complexes; Schiff base complexes