Solvent-mediated conformational similarities within a series of 1D coordination polymers constructed from a new flexible ditopic bis-imidazole ligand
作者:Storm V. Potts、Leonard J. Barbour
DOI:10.1039/c0nj00357c
日期:——
A novel conformationally flexible ditopic ligand 1,3-bis(1-imidazolyl-2-thione)-2,4,6-trimethylbenzene (L), bearing thioether linkages between a central aromatic moiety and two pendant imidazole rings, was synthesised. Treatment of L with CdI2 under varying conditions afforded four new solvates, [CdLI2]·H2O}n, [CdLI2]·CH3OH}n, [CdLI2]·2CH3CN}n, and [CdLI2]·2CH3OH}n, which were characterised by single crystal X-ray diffraction. In all four of the complexes the Cd metal centers are tetrahedrally coordinated to two iodide ions and two nitrogen atoms from separate L molecules to form continuous 1D polymeric strands. The solvent molecules participate in strong hydrogen bonding with the amino nitrogen atoms of the imidazole rings. Hirshfeld surface analysis and breakdown of the corresponding 2D fingerprint plots of the four structures provide a convenient means of quantifying the interactions within the crystal structures, revealing significant similarities in the interactions experienced by each complex.
我们合成了一种构象灵活的新型二位配体 1,3-双(1-咪唑基-2-硫酮)-2,4,6-三甲基苯(L),它在一个芳香族中心分子和两个咪唑环之间具有硫醚连接。在不同条件下用 CdI2 对 L 进行处理,可得到四种新的溶解物:[CdLI2]-H2O}n、[CdLI2]-CH3OH}n、[CdLI2]-2CH3CN}n 和 [CdLI2]-2CH3OH}n。在所有这四种复合物中,镉金属中心与来自不同 L 分子的两个碘离子和两个氮原子进行四面体配位,形成连续的一维聚合物链。溶剂分子参与了与咪唑环的氨基氮原子之间的强氢键作用。四种结构的 Hirshfeld 表面分析和相应二维指纹图的分解为量化晶体结构内的相互作用提供了一种便捷的方法,揭示了每个复合物所经历的相互作用的显著相似性。