Syntheses, structures and properties of a series of non-heme alkoxide-Fe(III) complexes as models for lipoxygenase

Wu Guiling; Mei Fusheng; Li Dongfeng

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Syntheses, structures and properties of a series of non-heme alkoxide-Fe(III) complexes as models for lipoxygenase

Wu Guiling 1,Mei Fusheng 2,Li Dongfeng 2 * #

1.College of Chemistry, Central China Normal University

2.College of Chemistry, Central China Normal University, Wuhan 430079

*Correspondence author

#Submitted by

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Funding: Youth Chen-Guang Project of Wuhan（No.No. 200850731361）, partially by the Program for Changjiang Scholars and Innovative Research Team in University（No.PCSIRT, No. IRT0953）, Specialized Research Fund for the Doctoral Program of Higher Education（No.No. 200805111004）, This research was supported by Program for New Century Excellent Talents in University （No.NCET-10-0406）

Opened online:26 April 2011

Accepted by: none

Citation: Wu Guiling,Mei Fusheng,Li Dongfeng.Syntheses, structures and properties of a series of non-heme alkoxide-Fe(III) complexes as models for lipoxygenase[OL]. [26 April 2011] http://en.paper.edu.cn/en_releasepaper/content/4422338

Treatment of Fe(ClO4)2o6H2O or Fe(ClO4)3o9H2O with a benzimidazolyl-rich ligand, N,N,N',N'-tetrakis[(1-methyl-2-benzimidazolyl)methyl]-1,2-ethanediamine (medtb) in alcohol/MeCN give a mononuclear ferrous complex, [FeII(medtb)](ClO4)2oCH3CNoCH3OH (1), and four non-heme alkoxide-iron(III) complexes, [FeIII(OMe)(medtb)](ClO4)2oH2O (2, alcohol = MeOH), [FeIII(OEt)(Hmedtb)](ClO4)3oCH3CN (3, alcohol = EtOH), [FeIII(OPrn)(Hmedtb)](ClO4)3o- nPrOHo2CH3CN (4, alcohol = n-PrOH), and [FeIII(OBun)(Hmedtb)](ClO4)3o3CH3CNoH2O (5, alcohol = n-BuOH), respectively. The alkoxideiron(III) complexes all show 1) a Fe(III)?-OR center (R = Me, 2; Et, 3; nPr, 4; nBu, 5) with the FeO bond distances in the range of 1.781-?1.816 , and 2) yellow color and an intense electronic transition around 370 nm. The alkoxide-iron(III) complexes can be reduced by organic compounds with cis,cis-1,4-diene moiety via the hydrogen atom abstraction reaction (HAAR).

Keywords:alkoxide complexes; crystal structure; HAAR

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