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首页> 外文期刊>Chemistry: A European journal >A New Series of Homoleptic, Paramagnetic Organochromium Derivatives: Synthesis, Characterization, and Study of Their Magnetic Properties
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A New Series of Homoleptic, Paramagnetic Organochromium Derivatives: Synthesis, Characterization, and Study of Their Magnetic Properties

机译：新型顺致顺磁性有机铬衍生物系列：合成，表征及其磁性的研究

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The synthesis and characterization of the triad of organochromium derivatives [Cr(C_6Cl_5)_4]~(n-) )n = 0, 1, 2) are described. By treating [CrCl_3(thf)_3] with LiC_6Cl_5 in 1:5 molar ratio, the salt [Li(thf)_4][Cr~(III)(C_6Cl_5)_4] (1) was obtained as a violet solid in 57% yield. Oxidation of 1 with [N(4-BrC_6H_4)_3][SbCl_6] (2) as a brown solid in 71% yield. The arylation of [CrCl_2(thf)] withLiC_6Cl_5 under similar conditions as above gave [{Li(thf)_3}_2(#mu#-Cl)]_2Cr~(II)(C_6Cl_5)_4] (3) as an extremely air- and water-sensitive red solid in 47% yield. The crystal and molecular structure of 1 and 3 have been established by X-ray diffraction methods. Complex 3 contains the unusual cation [{Li(thf)_3}_2(#mu#-Cl)]~+ with an almost linear Li-Cl-Li unit (174.2(6)deg). All four C_6Cl_5 groups are #signa#-bonded to the Cr~(II) center, which is located in a square-planar environment. The local geometry around the Cr~(III) center in 1 is, in turn, pseudo-octahedral, since two of the C_6Cl_5 groups act as standard #signa
机译：描述了有机铬衍生物[Cr（C_6Cl_5）_4]〜（n-））n = 0、1、2）三元组的合成和表征。通过以1：5的摩尔比用LiC_6Cl_5处理[CrCl_3（thf）_3]，以57％的紫色固体形式得到盐[Li（thf）_4] [Cr〜（III）（C_6Cl_5）_4]（1）。让。用[N（4-BrC_6H_4）_3] [SbCl_6]（2）氧化为褐色固体，氧化1的产率为71％。在与上述类似的条件下，[CrCl_2（thf）]与LiC_6Cl_5的芳基化反应产生了[{Li（thf）_3} _2（＃mu＃-Cl）] _ 2Cr〜（II）（C_6Cl_5）_4]（3） -和水敏感红色固体，产率为47％。 1和3的晶体和分子结构已通过X射线衍射法确定。配合物3包含不寻常的阳离子[{Li（thf）_3} _2（＃mu＃-Cl）]〜+，具有几乎线性的Li-Cl-Li单元（174.2（6）deg）。所有四个C_6Cl_5基团均被＃signa＃键合至Cr_（II）中心，该中心位于正方形平面环境中。 1中Cr〜（III）中心周围的局部几何形状又是伪八面体，因为两个C_6Cl_5基团充当标准#signa

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