The role of the metal connectors AgNO3, Cu2I2 and CuCl2 in co-ordination-polymer formation using the N2S2 ditopic ligand 1,4-bis(2-pyridylmethylsulfanylmethyl)benzene †
作者:Lyall R. Hanton、Kitty Lee
DOI:10.1039/a909601i
日期:——
The extended-reach ligand 1,4-bis(2-pyridylmethylsulfanylmethyl)benzene (L) was prepared by base coupling of 2-(chloromethyl)pyridinehydrochloride and 1,4-bis(sulfanylmethyl)benzene. This new ligand was treated with metal connectors AgNO3, CuX (X = Cl, Br or I) and CuCl2 to give co-ordination polymers. The crystal structures of [Ag2(L)(NO3)2]∞, [Cu2(L)I2]∞ and [Cu(L)Cl2]∞ were determined. Comparison of the structures showed that the anion influenced the mode of metal binding with chelating or bridging modes being observed. The anion also influenced the nature of the packing, with the silver polymer forming a three-dimensional array containing clathrated water ladders while the copper polymers existed as related one-dimensional polymers. The remarkable feature of these structures is that while the silver polymer showed extensive intermolecular interactions, the copper polymers, despite the prevalence of aromatic rings, each displayed only one type of CH/π interaction.
通过 2-(氯甲基)吡啶盐酸盐和 1,4-双(硫甲基)苯的碱偶联,制备了延伸配体 1,4-双(2-吡啶甲基硫甲基)苯 (L)。这种新配体经金属连接体 AgNO3、CuX(X = Cl、Br 或 I)和 CuCl2 处理后得到配位聚合物。测定了 [Ag2(L)(NO3)2]∞、[Cu2(L)I2]∞ 和 [Cu(L)Cl2]∞ 的晶体结构。对这些结构的比较表明,阴离子影响金属结合的模式,可观察到螯合或桥接模式。阴离子还影响了填料的性质,银聚合物形成了包含凝结水梯的三维阵列,而铜聚合物则是相关的一维聚合物。这些结构的显著特点是,银聚合物表现出广泛的分子间相互作用,而铜聚合物尽管普遍存在芳香环,但每种聚合物只表现出一种 CH/π 相互作用。