Yu Hai-Hui, Kong Li
Acta Crystallogr Sect E Struct Rep Online. 2009 Dec 9;66(Pt 1):m32. doi: 10.1107/S1600536809052118.
In the title complex, Cu(2)V(8)O(21)(2,2'-bpy)(2) (bpy = bipyridine, C(10)H(8)N(2)), the asymmetric unit contains four independent V atoms briged by 11 O atoms, one of which lies on an inversion center, and a Cu(2,2'-bpy) unit. Three V atoms in the polyoxoanion exhibit distorted tetra-hedral coordination geometries while the fourth V atom adopts a trigonal-bipyramidal geometry. The Cu atom adopts a square-pyramidal geometry being coordinated by two nitro-gen donors of a 2,2'-bpy ligand, and three bridging O atoms which are linked with V atoms. The V(8) polyoxoanion is connected to Cu(2,2'-bpy) cations, resulting in a two-dimensional layer structure extending parallel to (010). C-H⋯O hydrogen bonding consolidates the structure.
在标题配合物[Cu₂V₈O₂₁(2,2'-bpy)₂]ₙ（bpy = 联吡啶，C₁₀H₈N₂）中，不对称单元包含四个由11个O原子桥连的独立V原子，其中一个位于对称中心，以及一个[Cu(2,2'-bpy)]²⁺单元。多氧阴离子中的三个V原子呈现扭曲的四面体配位几何构型，而第四个V原子采用三角双锥几何构型。Cu原子采用四方锥几何构型，由一个2,2'-bpy配体的两个氮供体以及与V原子相连的三个桥连O原子配位。V₈多氧阴离子与[Cu(2,2'-bpy)]²⁺阳离子相连，形成平行于(010)延伸的二维层状结构。C—H⋯O氢键巩固了该结构。
