硫酸双（2-氨基-3-羧基吡啶鎓）三水合物
Bis(2-amino-3-carb-oxy-pyridinium) sulfate trihydrate.
作者信息
Berrah Fadila, Ouakkaf Amira, Bouacida Sofiane, Roisnel Thierry
出版信息
Acta Crystallogr Sect E Struct Rep Online. 2011 Apr 1;67(Pt 4):o953-4. doi: 10.1107/S1600536811010191. Epub 2011 Mar 23.
In the title compound, 2C(6)H(7)N(2)O(2) (+)·SO(4) (2-)·3H(2)O, there are two independent cations which are connected into N-H⋯O hydrogen-bonded dimers. In the crystal, O-H⋯O hydrogen-bonded sulfate-water sheets run parallel to (001) and are linked into a three-dimensional network via inter-molecular N-H⋯O and O-H⋯O hydrogen bonds through the 2-amino-nicotinium dimers. Further stabilization is provided by weak inter-molecular C-H⋯O hydrogen bonds. R(4) (3)(10) and R(2) (2)(8) graph-set rings are observed. The crystal studied was an inversion twin with refined components of 0.45 (6) and 0.55 (6).
在标题化合物2C₆H₇N₂O₂⁺·SO₄²⁻·3H₂O中，存在两个独立的阳离子，它们通过N-H⋯O氢键连接成二聚体。在晶体中，O-H⋯O氢键连接的硫酸根-水层平行于(001)，并通过2-氨基烟碱二聚体经由分子间N-H⋯O和O-H⋯O氢键连接成三维网络。分子间弱C-H⋯O氢键提供了进一步的稳定性。观察到R₄³(10)和R₂²(8)图形集环。所研究的晶体是一个倒反孪晶，精制组分比例为0.45(6)和0.55(6)。
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