Ferrocenyl‐Functionalized η
<sup>5</sup>
‐Thiophene Cr(CO)
<sub>3</sub>
Half‐Sandwich Compounds
作者:J. Matthäus Speck、Marcus Korb、Alexander Hildebrandt、Heinrich Lang
DOI:10.1002/ejic.201800749
日期:2018.11.8
These half‐sandwich compounds are accessible by the reaction of Cr(CO)3(MeCN)3 with the appropriate substituted thiophenes. The compounds were analyzed by NMR spectroscopy, where a highfield shift for the ring‐carbons and substituted hydrogen atoms of the thiophene core occurred. The 2,5‐ and 3,4‐derivatives could be characterized structurally by single‐crystal X‐ray diffraction analysis, demonstrating
的η的合成5 -Cr(CO)3配合2,5--Fc的2 - (图3a),3,4--Fc的2 - (3B),2,3--Fc的2 - (3C)和2- Fc-3个,4,5--ME 3个-thiophenes(3D)的Fc =铁(η 5 -C 5 H ^ 4)(η 5 -C 5 H ^ 5)]进行说明。这些半三明治化合物可通过Cr(CO)3(MeCN)3的反应获得与适当的取代噻吩。通过NMR光谱分析了这些化合物,其中噻吩核的环碳和取代氢原子发生了高场位移。的2,5-和3,4-衍生物可以结构上由单晶X射线衍射分析来表征,表明低的硫原子的向外弯曲了的噻吩平面外以9.95(17)°和抗二茂铁基和Cr(CO)3片段的排列是特征性的。电化学测量表明,对于Cr(CO)3络合物3b(372 mV)和3c的二茂铁基团,每个二茂铁基团单元可以分别被较高的氧化还原分离度氧化(334 mV),而不是非复合物质1b(244