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三种价态的分子低配[Fe-S-Fe]单元。

A Molecular Low-Coordinate [Fe-S-Fe] Unit in Three Oxidation States.

机构信息

Fachbereich Chemie, Philipps-Universität, Hans-Meerwein-Str. 4, 35043, Marburg, Germany.

Institut für Anorganische Chemie, Universität Göttingen, Tammannstr. 4, 37077, Göttingen, Germany.

出版信息

Chemistry. 2021 Apr 7;27(20):6348-6353. doi: 10.1002/chem.202100336. Epub 2021 Mar 5.

DOI:10.1002/chem.202100336
PMID:33512018
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8048577/
Abstract

A [Fe-S-Fe] subunit with a single sulfide bridging two low-coordinate iron ions is the supposed active site of the iron-molybdenum co-factor (FeMoco) of nitrogenase. Here we report a dinuclear monosulfido bridged diiron(II) complex with a similar complex geometry that can be oxidized stepwise to diiron(II/III) and diiron(III/III) complexes while retaining the [Fe-S-Fe] core. The series of complexes has been characterized crystallographically, and electronic structures have been studied using, inter alia, Fe Mössbauer spectroscopy and SQUID magnetometry. Further, cleavage of the [Fe-S-Fe] unit by CS is presented.

摘要

一个 [Fe-S-Fe] 亚基，其中一个硫桥连两个低配位铁离子，被认为是氮酶的铁-钼辅因子 (FeMoco) 的活性位点。在这里，我们报告了一个具有类似的双核单硫桥联二铁（II）配合物，该配合物可以分步氧化为二铁（II/III）和二铁（III/III）配合物，同时保留[Fe-S-Fe] 核。该系列配合物已通过晶体学进行了表征，并使用 Fe Mössbauer 光谱和 SQUID 磁强计等方法研究了其电子结构。此外，还提出了 CS 对 [Fe-S-Fe] 单元的裂解。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa0c/8048577/88e026b91dc6/CHEM-27-6348-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa0c/8048577/1855365c5182/CHEM-27-6348-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa0c/8048577/56d737854474/CHEM-27-6348-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa0c/8048577/70218ec66e63/CHEM-27-6348-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa0c/8048577/2bfd5af79cd4/CHEM-27-6348-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa0c/8048577/e0d248fd712b/CHEM-27-6348-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa0c/8048577/203be3969cea/CHEM-27-6348-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa0c/8048577/8ae1fae8cbf3/CHEM-27-6348-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa0c/8048577/87b3ca8edf6d/CHEM-27-6348-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa0c/8048577/88e026b91dc6/CHEM-27-6348-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa0c/8048577/1855365c5182/CHEM-27-6348-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa0c/8048577/56d737854474/CHEM-27-6348-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa0c/8048577/70218ec66e63/CHEM-27-6348-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa0c/8048577/2bfd5af79cd4/CHEM-27-6348-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa0c/8048577/e0d248fd712b/CHEM-27-6348-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa0c/8048577/203be3969cea/CHEM-27-6348-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa0c/8048577/8ae1fae8cbf3/CHEM-27-6348-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa0c/8048577/87b3ca8edf6d/CHEM-27-6348-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fa0c/8048577/88e026b91dc6/CHEM-27-6348-g007.jpg

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