A new arsenato-polyoxovanadate with the composition {[Ni(dien)2]3[V6As8O26]}2+·2 Cl– has been crystallized under solvothermal conditions as turquoise block-like crystals. The central structural feature is the [V6 IVAs8 IIIO26]4– cluster anion, which is composed of two trinuclear {V3O11} groups consisting of three edge-sharing VO5 polyhedra. Pairs of pyramidal AsO3 moieties share a common corner forming As2O5 units, which interconnect the {V3O11} groups. One of the [Ni(dien)2]2+ complexes adopts the s-fac (Ni1) and the second complex the mer configuration (Ni2). The Cl− anion is involved in strong hydrogen bonding interactions and links the [Ni(dien)2]2+ complexes to form twelve-membered rings which host the [V6As8O26]4– cluster anions. The Hirshfeld surface analysis yields a detailed picture of the intermolecular interactions revealing clear differences for the two unique [Ni(dien)2]2+ complexes. Intermolecular contacts also include As⋯H, O⋯H and H⋯H interactions. In the electronic spectrum the bands of d–d transitions of the vanadyl group and of the Ni2+ cations overlap, preventing a detailed analysis.

中文翻译：

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具有小[V6 IVAs8 IIIO26]4–簇阴离子的{[Ni(dien)2]3[V6As8O26]}2+·2 Cl–的溶剂热合成和选定性质

一种新的砷多氧钒酸盐，其组成为 {[Ni(dien)2]3[V6作为8氧26]}2+·2氯–在溶剂热条件下结晶为绿松石块状晶体。中心结构特征是[V6 四号作为8 三、氧26]4–簇阴离子，由两个三核{V3氧11} 由三个边缘共享 VO 组成的组5多面体。成对的锥体 AsO3部分共享一个共同的角形成As2氧5单元，其互连{V3氧11} 组。 [Ni(dien) 之一2]2+综合体采用表面活性剂(Ni1) 和第二个配合物梅尔配置（Ni2）。氯-阴离子参与强氢键相互作用并连接 [Ni(dien)2]2+配合物形成十二元环，其中承载[V6作为8氧26]4–簇阴离子。赫什菲尔德表面分析提供了分子间相互作用的详细图像，揭示了两种独特的 [Ni(dien)2]2+复合物。分子间接触还包括As⋯H、O⋯H和H⋯H相互作用。在电子能谱中，能带d–d氧钒基团和 Ni 的跃迁2+阳离子重叠，妨碍了详细分析。