Crystal structure of poly[bis­(μ-nicotinamide-κ2N1:O)bis­(μ-4-nitro­benzoato-κ2O1:O1′)zinc]

A#351; k#305; n G. #350; .; Necefo#287; lu H.; Tonbul A.M.; Dilek N.; H#246; kelek T.

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Crystal structure of poly[bis(μ-nicotinamide-κ2N1:O)bis(μ-4-nitrobenzoato-κ2O1:O1′)zinc]

机译：聚[双（μ-烟酰胺-κ2N1：O）双（μ-4-硝基苯并-κ2O1：O1'）锌的晶体结构

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The asymmetric unit of the title coordination polymer, [Zn(C7H4NO4)2(C6H6N2O)2]n, contains two 4-nitrobenzoate (NB) anions and two nicotinamide (NA) ligands. The ZnII atom has a slightly distorted octahedral coordination sphere. In the equatorial plane, it is coordinated by three carboxylate O atoms of the NB anions and one O atom of one of the two NA ligands. The axial positions are occupied by the pyridine N atoms of the two NA ligands. In the two NB anions, the carboxylate groups are twisted away from the attached benzene rings by 13.8 (2) and 13.4 (2)°, while the benzene rings are oriented at a dihedral angle of 11.5 (2)°. The dihedral angle between the NA rings is 10.3 (1)°. Only one of the two NB anions and one of the two NA ligands bridge adjacent ZnII ions through eight- and twelve-membered rings, respectively, forming polymeric chains running along the a-axis direction. In the crystal, N—H ⋯ O hydrogen bonds link adjacent chains, enclosing R(16), R22(20) and R66(16) ring motifs, forming layers parallel to (01-1). The layers are linked via a number of C—H⋯O hydrogen bonds, forming a three-dimensional network.

机译：标题配位聚合物[Zn（C7H4NO4）2（C6H6N2O）2] n的不对称单元包含两个4-硝基苯甲酸酯（NB）阴离子和两个烟酰胺（NA）配体。 ZnII原子具有稍微扭曲的八面体配位球。在赤道平面上，它由NB阴离子的三个羧基O原子和两个NA配体之一的一个O原子配位。轴向位置被两个NA配体的吡啶N原子占据。在两个NB阴离子中，羧酸酯基团从连接的苯环上扭转13.8（2）和13.4（2）°，而苯环的二面角为11.5（2）°。 NA环之间的二面角为10.3（1）°。两个NB阴离子中只有一个和两个NA配体之一分别通过八元和十二元环桥接相邻的ZnII离子，形成沿a轴方向延伸的聚合物链。在晶体中，NH = O的氢键连接相邻的链，并包围R（16），R22（20）和R66（16）的环状图案，形成平行于（01-1）的层。这些层通过多个CHOH氢键连接，形成三维网络。

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《Acta Crystallographica Section E: Crystallographic Communications》 |2015年第5期|共4页
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A#351; k#305; n G. #350; .; Necefo#287; lu H.; Tonbul A.M.; Dilek N.; H#246; kelek T.;
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中图分类晶体学;
关键词
CRYSTAL STRUCTUREZINC(II) COMPLEXBENZOIC ACIDNICOTINAMIDE DERIVATIVESHYDROGEN BONDING;

机译：晶体结构锌（II）络合物苯乙酰胺衍生物氢键键合;

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Crystal structure of poly[bis­(μ-nicotinamide-κ2N1:O)bis­(μ-4-nitro­benzoato-κ2O1:O1′)zinc]

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Crystal structure of poly[bis(μ-nicotinamide-κ2N1:O)bis(μ-4-nitrobenzoato-κ2O1:O1′)zinc]