کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1339618 | 979709 | 2008 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Synthesis and characterization of a bis-μ,η1-carboxylate-bridged dinuclear manganese(II) complex containing a tetradentate tripodal ligand, N-(benzimidazol-2-ylmethyl)iminodiacetic acid Synthesis and characterization of a bis-μ,η1-carboxylate-bridged dinuclear manganese(II) complex containing a tetradentate tripodal ligand, N-(benzimidazol-2-ylmethyl)iminodiacetic acid](/preview/png/1339618.png)
The dinuclear Mn(II) complex, [Mn2(Hbida)2(H2O)2], was prepared using a tetradentate tripodal ligand, N-(benzimidazol-2-ylmethyl)iminodiacetic acid (H3bida) which has two carboxylate and one benzimidazole groups. The manganese ions are doubly bridged using μ,η1-bridging monodentate carboxylate oxygen atoms. The Mn–Mn bond distance of 3.446 Å in the complex is comparable to that observed in the active site of the native manganese arginase enzyme (3.30 Å). The geometry of the complex with four carboxylates in two different types of binding modes, non-bridging monodentate and μ,η1-type bridging monodentate, mimics the active site structure of manganese arginase. The magnetic properties of the complex show a coupling constant of J = −0.471(1) cm−1, which is consistent with weakly coupled antiferromagnetic MnII (S = 5/2) centers. The cyclic voltammograms of the Mn(II) complex in DMF show irreversible oxidation occurring around 570 mV (versus Ag/AgCl).
A dinuclear manganese(II) complex has been prepared using a tripodal ligand, where the complex mimics several important structural features of the manganese arginase core, such as the simultaneous presence of both μ,η1 bridging carboxylate and non-bridging monodentate carboxylate binding modes, and an intramolecular hydrogen bond involving a coordinated water molecule.Figure optionsDownload as PowerPoint slide
Journal: Polyhedron - Volume 27, Issue 1, 20 January 2008, Pages 447–452