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首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >Chains, helices, sheets and unusual 3D nets: Diverse structures of the flexible, ditopic ligand 1,2-bis(3-(4-pyridyl)pyrazolyl)ethane
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Chains, helices, sheets and unusual 3D nets: Diverse structures of the flexible, ditopic ligand 1,2-bis(3-(4-pyridyl)pyrazolyl)ethane

机译:链,螺旋,薄片和不寻常的3D网络:灵活的对位配体1,2-双(3-(4-(吡啶基)吡唑基)乙烷

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摘要

The flexible ditopic ligand 1,2-bis(3-(4-pyridyl)pyrazol-1-yl)ethane (L-4Et) displays remarkable versatility in the complexes that it forms with transition metals with products ranging from 1 D chains to interpenetrating 3D networks. The L-4Et ligand itself crystallises in the space group P2(1), adopting a helical twist, although it is found in a variety of other conformations in its complexes. Coordination polymers containing the L-4Et ligand vary from almost straight, parallel 1 D chains of [Ag-2(L-4Et)(2)(ClO4)(2)(DMF)]center dot DMF (1), through interdigitating helical complexes containing tetrahedral Zn(II), JZn(NCS)(2)(L-4Et)]center dot DMF center dot H2O (2) to 2D sheets of [Cu(L4(4Et))(2)(H2O)(2)](PF6)(2)center dot xH(2)O (3) and the three-fold interpenetrating 3D network of [Co(L-4Et)(2)(NCS)(2)] (4). The 3D network adopts an unusual 3D 4-connected dmp (6(5).8) topology. Dimensionality can be limited by the use of chelating co-ligands, demonstrated by the formation of the dinuclear complex [(Cu(py-2,6-CO2)(H2O))(2)(L-4Et)] (5).
机译:柔性二位配体1,2-双(3-(4-(吡啶基)吡唑-1-基)乙烷(L-4Et)在与过渡金属形成的配合物中显示出显着的多功能性,其产物的范围从一维链到互穿3D网络。 L-4Et配体本身在空间群P2(1)中结晶,呈螺旋形扭曲,尽管在其配合物中还存在其他构象。含有L-4Et配体的配位聚合物通过交叉指代的螺旋形从[Ag-2(L-4Et)(2)(ClO4)(2)(DMF)]中心点DMF(1)的几乎笔直,平行的1 D链变化而来包含四面体Zn(II),JZn(NCS)(2)(L-4Et)]中心点DMF中心点H2O(2)的配合物到[D(Cu(L4(4Et))(2)(H2O)(2) )](PF6)(2)中心点xH(2)O(3)和[Co(L-4Et)(2)(NCS)(2)](4)的三重互穿3D网络。 3D网络采用不常见的3D 4连接dmp(6(5).8)拓扑。尺寸的限制可以通过使用螯合共配体来限制,这可以通过双核络合物[(Cu(py-2,6-CO2)(H2O))(2)(L-4Et)]的形成来证明(5)。

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