The Aryl Chlorine−Halide Ion Synthon and Its Role in the Control of the Crystal Structures of Tetrahalocuprate(II) Ions
The Aryl Chlorine−Halide Ion Synthon and Its Role in the Control of the Crystal Structures of Tetrahalocuprate(II) Ions
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DOI：
10.1021/cg030003y
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发表时间：
2003-04
影响因子：
3.8
通讯作者：
R. Willett;F. Awwadi;R. Butcher;S. Haddad;B. Twamley
中科院分区：
文献类型：
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作者：
R. Willett;F. Awwadi;R. Butcher;S. Haddad;B. Twamley
芳基溴卤离子（C−Br···X-）的超分子框架的发展中的作用进行了探讨，在一组六溴吡啶四卤代铜（II）盐。所述化合物属于（nBP）2CuX 4系列，其中nBP+表示n-溴吡啶鎓阳离子，n = 2、3或4，X = Cl-或Br-，并且包括（2BP）2CuBr 4、（3BP）2CuBr 4、（4 BP）2CuBr 4、（2BP）2CuCl 4、（3BP）2CuCl 4和（4 BP）2CuCl 4。结构都由孤立的吡啶阳离子和扁平四面体CuX 42-阴离子。这些离子物种的超分子组装主要由新的C−Br···X-合成子和更传统的N−H···X-合成子控制。C−Br···X-合成子的特征始终是本质上线性的C−Br···X-角，其中Br···X-接触比货车德瓦尔斯半径之和小0.3 - 0.4 A。相比之下，N−H···X-介子呈现出各种各样的几何形状：线性、对称分叉和非对称分叉。在所有情况下，低维超分子网络的基础上开发的组合…
The role of the arylbromine-halide ion (C−Br···X-) synthons in the development of the supramolecular frameworks is explored in a set of six bromopyridinium tetrahalocuprate(II) salts. The compounds belong to the series (nBP)2CuX4, where nBP+ denotes the n-bromopyridinium cation and n = 2, 3, or 4 and X = Cl- or Br- and include (2BP)2CuBr4, (3BP)2CuBr4, (4BP)2CuBr4, (2BP)2CuCl4, (3BP)2CuCl4, and (4BP)2CuCl4. The structures all consist of isolated pyridinium cations and flattened tetrahedral CuX42- anions. The supramolecular assembly of these ionic species is dominated by the novel C−Br···X- synthon and the more traditional N−H···X- synthon. The C−Br···X- synthon is invariably characterized by essentially linear C−Br···X- angles with Br···X- contacts 0.3−0.4 A less than the sum of the van der Waals radii. In contrast, the N−H···X- synthons show a variety of geometries: linear, symmetric bifurcated, and asymmetric bifurcated. In all cases, low dimensional supramolecular networks are developed based on combi...