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首页> 外文期刊>Acta Crystallographica Section E: Crystallographic Communications >Crystal structure of trans-di­aqua­bis­(nicotinamide-κN1)bis­(4-nitro­benzoato-κO)manganese(II)
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Crystal structure of trans-di­aqua­bis­(nicotinamide-κN1)bis­(4-nitro­benzoato-κO)manganese(II)

机译:反式双(烟酰胺-κN1)双(4-硝基苯并-κO)锰的晶体结构(II)

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摘要

The asymmetric unit of the title compound, [Mn(C7H4NO4)2(C6H6N2O)2(H2O)2], contains one MnII atom, one 4-nitro­benzoate (NB) anion, one nicotinamide (NA) ligand and one water mol­ecule; NA and NB each act as a monodentate ligand. The MnII atom, lying on an inversion centre, is coordinated by four O atoms and two pyridine N atoms in a distorted octa­hedral geometry. The water mol­ecules are hydrogen bonded to the carboxyl­ate O atoms. The dihedral angle between the carboxyl­ate group and the adjacent benzene ring is 24.4 (3)°, while the benzene and pyridine rings are oriented at a dihedral angle of 86.63 (11)°. In the crystal, O—H⋯O and N—H⋯O hydrogen bonds link the mol­ecules, forming a layer parallel to the ab plane. The layers are further linked via weak C—H⋯O hydrogen bonds, a π–π stacking inter­action [centroid–centroid distance = 3.868 (2) Å] and a weak C—H⋯π inter­action, resulting in a three-dimensional network.
机译:标题化合物[Mn(C7H4NO4)2(C6H6N2O)2(H2O)2]的不对称单元包含一个MnII原子,一个4-硝基苯甲酸酯(NB)阴离子,一个烟酰胺(NA)配体和一个水分子; NA和NB各自充当单齿配体。 MnII原子位于一个反转中心,由四个O原子和两个吡啶N原子以扭曲的八面体几何形状进行配位。水分子氢键合到羧酸O原子上。羧酸酯基团与相邻的苯环之间的二面角为24.4°(3)°,而苯环和吡啶环的二面角为86.63°(11)°。在晶体中,OH和NH的氢键连接分子,形成平行于ab平面的层。这些层通过弱的C-H hydrogenO氢键,π-π的堆积相互作用[质心-质心距离= 3.868(2)Å]和弱的C-H⋯π相互作用进一步相连,从而形成三维网络。

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