We have synthesised and characterised the complex Ni(tpy)₂ (tpy = 2,2′:6′,2′′-terpyridine). This formally Ni(0) complex is paramagnetic both in the solid state and in solution (S = 2). The crystal structure shows an octahedral geometry, with molecules arranged in independent dimers involving π-stacking between pairs of complexes. Magnetic measurementes and DFT calculations suggest the existence of temperature-dependent intermolecular antiferromagnetic coupling in the solid state.

中文翻译：

---

Ni(2,2′:6′,2′′-三联吡啶)2：高自旋八面体形式Ni(0)配合物

我们合成并表征了配合物Ni(tpy) ₂ (tpy = 2,2′:6′,2′′-三联吡啶)。这种形式上的 Ni(0) 配合物在固态和溶液中都具有顺磁性 ( S = 2)。晶体结构呈现八面体几何形状，分子排列成独立的二聚体，涉及复合物对之间的 π 堆积。磁测量和 DFT 计算表明固态中存在温度依赖性分子间反铁磁耦合。