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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Complexes of manganese, iron and cobalt with sterically demanding indenyl ligands
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Complexes of manganese, iron and cobalt with sterically demanding indenyl ligands

机译:锰,铁和钴与空间要求的茚基配体的配合物

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摘要

A series of manganese, iron and cobalt complexes bearing sterically demanding 1,3-disubstituted indenyl ligands, 1,3-(Me _3C) _2C _9H _5 (Ind ~(tBu)) (1) and 1,3-(C _6H _(11)) 2C _9H _5 (Ind ~(cHexyl)) (2), has been prepared. These complexes have been fully characterised by various spectroscopic techniques, elemental analysis, and X-ray diffraction experiments. In addition the electronic and steric properties of these ligands have been evaluated. Although the cone angles and electronic properties are similar to 1,2,4-(Me _3C) _3C _5H _2 (Cp′), indenyl iron half-sandwich complexes are only stable at low temperature. This has been demonstrated for 1-FeI using suitable trapping experiments such as CO or NaCp′ addition to yield 1-Fe(CO) _2I and 1-FeCp′, respectively. Overall the metal-ligand bonds in these indenyl compounds are weaker than in the corresponding cyclopentadienyl derivatives. In addition, the bis(indenyl)manganese complexes, 1-Mn and 2-Mn, are high-spin, as established by solid state magnetic susceptibility studies in the temperature range 2-300 K.
机译:一系列具有空间要求的1,3-二取代茚基配体,1,3-(Me _3C)_2C _9H _5(Ind〜(tBu))(1)和1,3-(C _6H _)的锰,铁和钴络合物(11))已制备2 C _9H _5(Ind〜(cHexyl))(2)。这些配合物已通过各种光谱技术,元素分析和X射线衍射实验得到了充分表征。另外,已经评估了这些配体的电子和空间特性。尽管锥角和电子性质类似于1,2,4-(Me _3C)_3C _5H _2(Cp'),但茚基铁半三明治复合物仅在低温下稳定。使用合适的捕集实验(如CO或NaCp'添加)分别证明1-Fe(CO)_2I和1-FeCp'可以用于1-FeI。总体上,这些茚基化合物中的金属-配体键比相应的环戊二烯基衍生物中的弱。此外,双(茚基)锰配合物1-Mn和2-Mn具有高自旋性,这是通过在2-300 K的温度范围内进行的固态磁化率研究确定的。

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