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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Copper inverse-9-metallacrown-3 compounds showing antisymmetric magnetic behaviour
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Copper inverse-9-metallacrown-3 compounds showing antisymmetric magnetic behaviour

机译：呈反对称磁行为的反相9-metallacrown-3铜化合物

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摘要

The use of phenyl 2-pyridyl ketoxime (PhPyCNO)/X- "blends" (X- = OH-, Cl-, ClO4-) in copper chemistry has yielded trinuclear clusters that have been characterized as inverse-9-metallacrown-3 accommodating one or two anions. The magnetic behaviour has shown a large antiferromagnetic interaction. The discrepancy between the Brillouin curve and the experiment has been assigned to the influence of the antisymmetric interaction. By introducing in the magnetization formula the antisymmetric terms derived from the fitting of the susceptibility data the simulated curve become almost superimposable to the experimental one. From the EPR findings it has been shown that the compound [Cu-3(PhPyCNO)(3)(OCH3)(Cl)(ClO4)] (1) having isosceles magnetic symmetry or lower (delta not equal 0), the antisymmetric exchange is important (G not equal 0) and Delta E > hv. The structures of the two complexes have been determined by single-crystal X-ray crystallography.
机译：在铜化学中使用苯基2-吡啶基酮肟（PhPyCNO）/ X-“共混物”（X- = OH-，Cl-，ClO4-）产生了三核簇，其特征为可逆9-金属催乳素3一或两个阴离子。磁性表现出很大的反铁磁相互作用。布里渊曲线与实验之间的差异已经归因于反对称相互作用的影响。通过在磁化公式中引入由磁化率数据拟合得出的反对称项，模拟曲线几乎可以与实验曲线叠加。从EPR的结果表明，化合物[Cu-3（PhPyCNO）（3）（OCH3）（Cl）（ClO4）]（1）具有等腰磁对称或更低（δ不等于0），反对称交换是重要的（G不等于0）并且Delta E> hv。两种配合物的结构已经通过单晶X射线晶体学确定。

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