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首页> 外文期刊>Acta Crystallographica Section E: Crystallographic Communications >Isotypic MnII and FeII binuclear complexes of the ligand 5,6-bis-(pyridin-2-yl)-pyrazine-2,3-di-carb-oxy-lic acid
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Isotypic MnII and FeII binuclear complexes of the ligand 5,6-bis-(pyridin-2-yl)-pyrazine-2,3-di-carb-oxy-lic acid

机译:配体5,6-双-(吡啶-2-基)-吡嗪-2,3-二碳-氧-酸的同型MnII和FeII双核配合物

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The title isotypic complexes, bis-[μ-5,6-bis-(pyridin-2-yl)pyrazine-2,3-di-carboxylato]-κ4N1,O2,N6:O3;κ4O3:N1,O2,N6-bis-[di-aqua-manganese(II)] tetra-hydrate, [Mn2(C16H8N4O4)2(H2O)4]·4H2O, (I), and bis-[μ-5,6-bis-(pyridin-2-yl)pyrazine-2,3-di-carboxyl-ato]-κ4N1,O2,N6:O3;κ4O3:N1,O2,N6-bis-[di-aqua-iron(II)] tetrahydrate, [Fe2(C16H8N4O4)2(H2O)4]·4H2O, (II), are, respectively, the mangan-ese(II) and iron(II) complexes of the ligand 5,6-bis-(pyridin-2-yl)-pyrazine-2,3-di-carb-oxy-lic acid. The complete mol-ecule of each complex is generated by inversion symmetry. Each metal ion is coordinated by a pyrazine N atom, a pyridine N atom, two carboxyl-ate O atoms, one of which is bridging, and two water O atoms. The metal atoms have MN2O4 coordination geometries and the complexes have a cage-like structure. In the crystals of both compounds, the complexes are linked by O—H?O and O—H?N hydrogen bonds involving the coordinating water mol-ecules, forming chains along [100]. These chains are linked by O—H?O hydrogen bonds involving the non-coordinating water mol-ecules, forming layers parallel to (011). The layers are linked by pairs of C—H?O hydrogen bonds and offset π–π inter-actions, so forming a hydrogen-bonded three-dimensional framework.
机译:标题同型物,双-[μ-5,6-双-(吡啶-2-基)吡嗪-2,3-二羧基]-κ4N1,O2,N6:O3;κ4O3:N1,O2,N6-双-[二-水-锰(II)]四水合物,[Mn2(C16H8N4O4)2(H2O)4]·4H2O,(I)和双-[μ-5,6-双-(吡啶-2) -基)吡嗪-2,3-二羧基-氨基]-κ4N1,O2,N6:O3;κ4O3:N1,O2,N6-双-[二-水-二价铁(II)]四水合物)2(H2O)4]·4H2O(II)分别是配体5,6-双-(吡啶-2-基)-吡嗪-的锰-铁(II)和铁(II)配合物2,3-二碳-羟基酸。每个配合物的完整分子通过反对称产生。每个金属离子由一个吡嗪N原子,一个吡啶N原子,两个羧基O原子(其中一个是桥联的)和两个水O原子配位。金属原子具有MN2O4配位几何形状,并且配合物具有笼状结构。在这两种化合物的晶体中,配合物通过涉及配位水分子的OH和OH氢键连接,沿着[100]形成链。这些链通过涉及非配位水分子的OH氢键相连,形成平行于(011)的层。这些层之间通过成对的C–H?O氢键和π-π相互作用抵消,从而形成氢键键合的三维框架。

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