Oxalate-bridged binuclear iron(III) complexes of two pyridine-based aminophenol ligands

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• 作者：Sima Heidari ; Elham Safaei ; Andrzej Wojtczak ; Patricia Coti?
• 关键词：Iron complexes ; Binuclear complexes ; Oxalate complexes ; Crystal structures ; Electrochemistry
• 刊名：Inorganica Chimica Acta
• 出版年：2013
• 出版时间：24 August, 2013
• 年：2013
• 卷：405
• 期：Complete
• 页码：134-139
• 全文大小：816 K

文摘

Two oxalate-bridged binuclear iron(III) complexes, [(FeL^APMe)₂(¦Ì-ox)] (1) and [(FeL^APOMe)₂(¦Ì-ox)] (2), in which H₂L^APMe and H₂L^APOMe are pyridine-based di-methyl and tert-butyl methoxy substituted aminophenol ligands respectively, were prepared. Both compounds have been characterized by X-ray crystallography, infrared spectroscopy, UV-Vis spectroscopic techniques, cyclic voltammetry analysis, and magnetic susceptibility studies. In both crystals, each iron(III) is coordinated by the oxygen atoms of an oxalate bridging ligand, two phenolate oxygen atoms, and amine nitrogens of ligands. The variable temperature magnetic susceptibility indicates antiferromagnetic coupling between iron centers in both complexes. Cyclic voltammograms of 2 in CH₂Cl₂ at low temperature showed quasi-reversible peaks corresponding to ligand-centered oxidations.