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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Small iron-carbonyl clusters bearing imidazolium-2-trithioperoxycarboxylate ligands
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Small iron-carbonyl clusters bearing imidazolium-2-trithioperoxycarboxylate ligands

机译：亚咪唑鎓-2-三硫代铁氧基羧酸配体的小铁 - 羰基簇

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摘要

The reaction of [Fe-2(CO)(9)] with two representative imidazolium-2-dithiocarboxylate zwitterions derived from common N-heterocyclic carbenes (NHCs) bearing mesityl (IMes) or 2,6-diisopropylphenyl substituents on their nitrogen atoms (IDip) unexpectedly afforded two small bimetallic iron-carbonyl clusters with the generic formula [Fe-2(CO)(6)(mu-kappa(2)-S, S '-kappa(2)-S, S '-S3C center dot NHC)]. After a brief optimization of the reaction conditions, these two "sulfur-enriched" products were isolated in low yields. They were fully characterized by IR, NMR, UV/Visible, and ESI-MS techniques, and their molecular structures were determined by single crystal X-ray diffraction analysis. The two compounds adopted a butterfly-type disposition in the solid state, with an [Fe-2(CO)(6)] core bridged by the trithioperoxycarboxylate moiety of the in situ generated NHC center dot CS3 ligands. Bond lengths recorded for the CS3- unit revealed that its negative charge was mostly located on the remote sulfur atom.
机译：[Fe-2（CO）（9）]与两种代表性咪唑鎓-2-二硫代羧酸甲酯的反应衍生自氮原子上的共同的N-杂环碳碳酸酯（NHCS）或2,6-二异丙基苯基取代基（ IDIP）意外地提供了两种小型双金属铁羰基簇，具有通用式[Fe-2（Co）（6）（Mu-Kappa（2）-S，S'-Kappa（2）-S，S'-S3C中心点NHC）]。在短暂优化反应条件后，将这两种“富含硫化”产物以低产率分离。它们完全由IR，NMR，UV /可见和ESI-MS技术表征，并且它们的分子结构由单晶X射线衍射分析确定。两种化合物采用固态的蝶形型布置，其中通过原位产生的三硫代羰基羧酸盐部分桥接的[Fe-2（CO）（6）]核心产生的NHC中心点CS3配体。记录为CS3的键长显示其负电荷大多位于远程硫原子上。

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