title: Synthesis, magnetic and spectroscopic studies of a Schiff base derived from cephaclor and 1,2-diaminobenzene and its transition metal complexes.
abstract: M(II) coordination compounds of Mn, Fe, Co and Ni with a Schiff base (HL) derived from the condensation of cephaclor antibiotic with 1,2-diaminobenzene were synthesized and characterized by several techniques, including elemental and thermal analysis, molar conductance and magnetic susceptibility measurements, electronic, FT-IR, EPR and (1)H NMR spectral studies. The analytical and molar conductance values indicated that the chloride ions coordinate to the metal ions. Based on these studies, the general formulae [M(L)Cl(H2O)] (M(II)=Mn, Fe, Co, Ni) are proposed for the complexes. The ligand HL behaves as a monoanionic tetradentate NNNO chelating agent.
authors.affiliation: Department of Chemistry, Universidad de Oriente, Cumana 6101, Venezuela. juananacona@hotmail.com
authors.forename: Juan
authors.initials: J
authors.lastname: Anacona
authors.forename: Javier
authors.initials: J
authors.lastname: Santaella
mesh_terms: D002433:Cefaclor / Q000737:chemistry*; D056831:Coordination Complexes / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy; D004583:Electrons; D060328:Magnetic Phenomena; D009682:Magnetic Resonance Spectroscopy; D010655:Phenylenediamines / Q000737:chemistry*; D012545:Schiff Bases / Q000138:chemical synthesis* / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D028561:Transition Elements / Q000737:chemistry*; D014732:Vibration
chemical_list: D056831:Coordination Complexes; D010655:Phenylenediamines; D012545:Schiff Bases; D028561:Transition Elements; D002433:Cefaclor; C034193:1,2-diaminobenzene
keywords: Magnetic studies; Schiff base containing cephaclor; Schiff base metal complexes; Spectroscopic studies; Synthesis; Synthesis cephaclor derivative