The doubly oxo-bridged dinuclear Fe(III) complex, [Fe₂(hmp)₂Cl₄], as a reaction product of the [Mn₄(hmp)₆(NO₃)₂(H₂O)₂]²⁺ cluster with [FeCl₄

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• 作者：L.A. Kushch^a ; ^{lkushch@icp.ac.ru} ; A.V. Nikolaev^a ; E.B. Yagubskii^a ; ^{yagubski@icp.ac.ru} ; S.V. Simonov^b ; R.P. Shibaeva^b ; A.V. Sadakov^c ; O.E. Omel'yanovskii^c ; V.S. Mironov^d ; ^{mirsa@list.ru}
• 关键词：Oxo-bridged dinuclear Fe(III) complex ; Mixed-ligand five-fold coordination ; Crystal structure ; Trigonal bipyramidal geometry ; Magnetic properties ; Antiferromagnetic coupling
• 刊名：Inorganic Chemistry Communications
• 出版年：2012
• 出版时间：July, 2012
• 年：2012
• 卷：21
• 期：Complete
• 页码：57-60
• 全文大小：423 K

文摘

The bis(¦Ì-alkoxo)-bridged dinuclear iron(III) complex, [Fe₂(hmp)₂Cl₄] (I), [hmp = 2-hydroxymethylpyridine] was synthesized by reaction of the [Mn₄(hmp)₆(NO₃)₂(H₂O)₂](ClO₄)₂ with (Et₄N)[FeCl₄] under conditions of slow diffusion of starting reagents into solvent and characterized by single crystal X-ray diffraction and variable-temperature magnetic susceptibility measurements. The iron centers have a mixed-ligand five-fold coordination (O₂NCl₂) with a distorted trigonal bipyramidal geometry. Two Fe(III) ions are bridged by the oxygen atoms from two hmp ligands, with Fe ???#xA0;Fe distance of 3.158(1) ? and Fe-O-Fe bridge angle 107.37(7)¡ã. Magnetic studies in the temperature range 300-4.2 K indicated a moderately strong intramolecular antiferromagnetic coupling between the high-spin Fe(III) ions with J = ?#xA0;38.5 cm^?#xA0;1.