The synthesis of a Cu₄(OH)₄ cube which is coordinated by four molecules of the dipyridyl ligand 1,6‐[di(pyridin‐4‐yl)hex‐3‐ene] is reported. This compound has a trans double bond which restricts the conformational freedom of the ligand and favours coordination within a unique copper cube. The structure was solved by an X‐Ray single crystal structure determination and low temperature magnetic susceptibility measurements examined its magnetic properties. The cube classification corresponds to the type I classification of Mergehenn and Haase and the short/long distribution of Cu ⋅⋅⋅ Cu separations in the cube as defined by Ruiz. The magnetic susceptibility measurements show paramagnetic behaviour down to 50 K but below this the copper cube shows weak ferromagnetic exchange interactions. The low temperature magnetic susceptibility characteristics are examined in detail then modelled and compared to other similar Cu₄O₄ copper cubes.

中文翻译：

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铜立方体的合成与磁性：[Cu4（OH）4（C16H18N2）4] 4+（ClO4）4 C3H6O [C16H18N2 =（E）-1,6- [二（吡啶-4-基）己基-3] -ene]。

据报道，Cu ₄（OH）₄立方体的合成是由四分子二吡啶基配体1,6- [二（吡啶-4-基）己-3-烯]协调。该化合物具有反式限制配体构象自由的双键，有利于在独特的铜立方体内进行配位。该结构通过X-射线单晶结构确定和低温磁化率测量来检验其磁性。立方体分类对应于Mergehenn和Haase的I类分类以及立方体中Cu⋅⋅⋅Cu间隔的长/短分布（如Ruiz所定义）。磁化率测量结果显示，低至50 K的顺磁行为，但低于此值，铜立方体显示出弱的铁磁交换相互作用。将详细检查低温磁化率特性，然后对其进行建模，并将其与其他类似的Cu ₄ O ₄铜立方体进行比较。