Hemamalini Madhukar, Fun Hoong-Kun
X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia.
Acta Crystallogr Sect E Struct Rep Online. 2010 May 29;66(Pt 6):o1496-7. doi: 10.1107/S1600536810019677.
The title salt, C(5)H(6)ClN(2) (+)·C(3)H(3)O(4) (-), contains two cations and two anions in the asymmetric unit. Both 2-amino-5-chloro-pyridinium ions are protonated at their pyridine N atoms and both hydrogen malonate ions feature an intra-molecular O-H⋯O hydrogen bond, which generates an S(6) ring motif and results in a folded conformation. In the crystal structure, the cations and anions are linked via N-H⋯O, O-H⋯O and C-H⋯O hydrogen bonds, forming chains propagating in [010], which are cross-linked by further C-H⋯O inter-actions.
标题盐C(5)H(6)ClN(2) (+)·C(3)H(3)O(4) (-)的不对称单元中包含两个阳离子和两个阴离子。两个2-氨基-5-氯吡啶鎓离子均在其吡啶N原子处质子化，且两个丙二酸氢根离子均具有分子内O-H⋯O氢键，形成S(6)环 motif 并导致折叠构象。在晶体结构中，阳离子和阴离子通过N-H⋯O、O-H⋯O和C-H⋯O氢键相连，形成沿[010]方向传播的链，这些链通过进一步的C-H⋯O相互作用交联。
