{2Fe3S} clusters related to the di-iron sub-site of the H-centre of all-iron hydrogenases
作者:Mathieu Razavet、Sian C. Davies、David L. Hughes、Christopher J. Pickett
DOI:10.1039/b102244j
日期:——
The first synthetic 2Fe3S} clusters structurally
related to the sub-site of the H-centre of the all-iron hydrogenases are
described: tripodal dithiolate thioether ligands allow the synthesis of
di-iron pentacarbonyls with differential (2∶3) S ligation of the Fe
atoms.
首次合成的2Fe3S}簇在结构上与全铁氢化酶的 H-中心子位点有关:三元二硫醇硫醚配体可以合成二铁五羰基,铁原子上有不同的 (2∶3) S 键合。
Advanced Electron Paramagnetic Resonance and Density Functional Theory Study of a {2Fe3S} Cluster Mimicking the Active Site of [FeFe] Hydrogenase
作者:Alexey Silakov、Jennifer L. Shaw、Eduard J. Reijerse、Wolfgang Lubitz
DOI:10.1021/ja107793e
日期:2010.12.15
picture of the electronic structure of this complex. A theoretical study using density functional theory (DFT) calculations identified possible isomers of the compound and further refined the knowledge about its properties. It was found that upon one electron oxidation of the parent Fe(I)-Fe(I) complex, the dominant mixed-valence Fe(I)-Fe(II) species is the one in which the CNligand of the iron center that
尽管对 [FeFe] 氢化酶的活性位点进行了广泛的研究,但尚未完全了解有关“氢转化簇”特性的许多细节。所谓的 H 簇的复杂性是研究其组件特性的主要困难之一。本研究旨在研究在结构上与氧化还原反应密切相关的混合价 EPR 活性 [Fe2(μ-CO)(CO)3(CN)2MeSCH2C(Me)(CH2S)2}](1-)处于 CO 抑制氧化状态的 H 簇的活性双核部分。在这项工作中,我们通过先进的脉冲 EPR 方法对这种化合物进行了表征。(57)Fe、(1)H、(2)H、(14)N 和 (15)N 电子核超精细相互作用的准确测定提供了该复合物电子结构的非常详细的图片。一项使用密度泛函理论 (DFT) 计算的理论研究确定了该化合物的可能异构体,并进一步完善了有关其性质的知识。发现在母体 Fe(I)-Fe(I) 复合物的一个电子氧化后,占主导地位的混合价 Fe(I)-Fe(II) 物种是其中铁中心的 CN
All-iron hydrogenase: synthesis, structure and properties of {2Fe3S}-assemblies related to the di-iron sub-site of the H-clusterElectronic supplementary information (ESI) available: crystal and structure refinement data for complexes 4a, 4b and 5a. See http://www.rsc.org/suppdata/dt/b2/b209690k/
作者:Mathieu Razavet、Sian C. Davies、David L. Hughes、J. Elaine Barclay、David J. Evans、Shirley A. Fairhurst、Xiaoming Liu、Christopher J. Pickett
DOI:10.1039/b209690k
日期:2003.2.11
inversion at the thioether sulfur in the carbonylcomplexes. The Mössbauer data affirm that the coordination environment of the two iron atoms in a dicyanide bridging carbonyl intermediate are differentiated. Bridging carbonyl intermediates have been structurally and spectroscopically identified in resting and CO inhibited forms of the sub-site of all-iron hydrogenases; the observation of a thermally unstable