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 22;66(Pt 6):o1416-7. doi: 10.1107/S1600536810018192.
The asymmetric unit of the title compound, C(5)H(5)ClN(2)·0.5C(4)H(4)O(4), comprises a neutral 2-amino-5-chloro-pyridine mol-ecule and one half of a fumaric acid mol-ecule which lies on an inversion center. The dihedral angle between the pyridine ring and the plane formed by the fumaric acid mol-ecule is 3.22 (8)°. The 2-amino-5-chloro-pyridine mol-ecule is planar, with a maximum deviation of 0.004 (1) Å for the pyridine N atom. In the crystal, the 2-amino-5-chloro-pyridine mol-ecules inter-act with the carboxyl groups of fumaric acid mol-ecules through N-H⋯O and O-H⋯N hydrogen bonds, forming centrosymmetric R(2) (2)(8) ring motifs and another N-H⋯O hydrogen bond links these motifs into a two-dimensional network parallel to (100).
标题化合物C(5)H(5)ClN(2)·0.5C(4)H(4)O(4)的不对称单元包含一个中性的2-氨基-5-氯吡啶分子和位于对称中心的半个富马酸分子。吡啶环与富马酸分子形成的平面之间的二面角为3.22 (8)°。2-氨基-5-氯吡啶分子是平面的，吡啶N原子的最大偏差为0.004 (1) Å。在晶体中，2-氨基-5-氯吡啶分子通过N-H⋯O和O-H⋯N氢键与富马酸分子的羧基相互作用，形成中心对称的R(2) (2)(8)环 motif，另一个N-H⋯O氢键将这些motif连接成平行于(100)的二维网络。
