Hemamalini Madhukar, Goh Jia Hao, Fun Hoong-Kun
X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia.
Acta Crystallogr Sect E Struct Rep Online. 2011 Nov;67(Pt 11):o3123. doi: 10.1107/S1600536811044473. Epub 2011 Oct 29.
In the title mol-ecular salt, C(5)H(8)N(3) (+)·C(5)H(7)O(4) (-), the 2,3-diamino-pyridine mol-ecule is protonated at the pyridine N atom. The cation is essentially planar, with a maximum deviation of 0.015 (2) Å, and the anion adopts an extended conformation. In the crystal, the hydrogen glutarate (4-carb-oxy-butano-ate) anions are self-assembled through O-H⋯O hydrogen bonds, forming chains. The cations are connected to the anion chains via N-H⋯O hydrogen bonds, forming a three-dimensional network. The crystal structure also features aromatic π-π inter-actions between the pyridinium cations, with a centroid-centroid distance of 3.4464 (10) Å.
在标题分子盐C(5)H(8)N(3) (+)·C(5)H(7)O(4) (-)中，2,3-二氨基吡啶分子在吡啶N原子处质子化。阳离子基本呈平面状，最大偏差为0.015 (2) Å，阴离子呈伸展构象。在晶体中，氢戊二酸根（4-羧基丁酸根）阴离子通过O-H⋯O氢键自组装形成链。阳离子通过N-H⋯O氢键与阴离子链相连，形成三维网络。晶体结构还具有吡啶鎓阳离子之间的芳香π-π相互作用，质心间距为3.4464 (10) Å。
