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首页> 外文期刊>Acta crystallographica. Section C, Structural chemistry. >Hydrogen bonding in two benzene‐1,2‐diaminium pyridine‐2‐carboxylate salts and a cocrystal of benzene‐1,2‐diamine and benzoic acid
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Hydrogen bonding in two benzene‐1,2‐diaminium pyridine‐2‐carboxylate salts and a cocrystal of benzene‐1,2‐diamine and benzoic acid

机译:在两个苯-1,2-二氨基鎓-2-羧酸盐和苯-1,2-二胺和苯甲酸的氢键合中的氢键

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摘要

The isostructural salts benzene‐1,2‐diaminium bis(pyridine‐2‐carboxylate), 0.5C 6 H 10 N 2 2+ ·C 6 H 4 NO 2 ? , (1), and 4,5‐dimethylbenzene‐1,2‐diaminium bis(pyridine‐2‐carboxylate), 0.5C 8 H 14 N 2 2+ ·C 6 H 4 NO 2 ? , (2), and the 1:2 benzene‐1,2‐diamine–benzoic acid cocrystal, 0.5C 6 H 8 N 2 ·C 7 H 6 O 2 , (3), are reported. All of the compounds exhibit extensive N—H…O hydrogen bonding that results in interconnected rings. O—H…N hydrogen bonding is observed in (3). Additional π–π and C—H…π interactions are found in each compound. Hirshfeld and fingerprint plot analyses reveal the primary intermolecular interactions and density functional theory was used to calculate their strengths. Salt formation by (1) and (2), and cocrystallization by (3) are rationalized by examining p K a differences. The R 2 2 (9) hydrogen‐bonding motif is common to each of these structures.
机译:苯苯-1,2-二氨基鎓(吡啶-2-羧酸盐),0.5℃6 H 10 N 2+·C 6 H 4 NO 2? (1)和4,5-二甲基苯-1,2-二氨基鎓双(吡啶-2-羧酸盐),0.5℃8 H 14 N 2 2+·C 6 H 4 NO 2? 报道,(2)和1:2苯-1,2-二胺 - 苯甲酸聚碳酸,0.5℃6 H 8 N 2·C 7 H 6 O 2,(3)。 所有化合物都具有很大的N-H ... O氢键,导致互连环。 在(3)中观察到O-H ... N氢键。 在每个化合物中发现另外的π-π和C-H ...π相互作用。 HIRSHFELD和指纹绘图分析显示初级分子间相互作用,密度泛函理论用于计算它们的优势。 通过(1)和(2)的盐形成,并通过检查p k差异来合理合理合理。 R 2 2(9)氢键键合图案对于这些结构中的每一个是共同的。

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