Saleh Muhammad Idiris, Kusrini Eny, Rosli Mohd Mustaqim, Fun Hoong-Kun
Acta Crystallogr Sect E Struct Rep Online. 2008 Jun 21;64(Pt 7):o1318-9. doi: 10.1107/S1600536808018485.
In the crown ether ring of the title compound, C(20)H(24)O(6)·2C(6)H(3)N(3)O(7)·3H(2)O, the O-C(H(2))-C(H(2))-O torsion angles indicate a gauche conformation of the ethyl-eneoxy units, while the C-O-C-C torsion angles indicate planarity of these segments; the dihedral angle between the two benzene rings is 44.53 (13)°. In both picric acid mol-ecules, one of the nitro groups is twisted away from the attached ring. The mol-ecules are linked into chains along the b axis via inter-molecular O-H⋯O hydrogen bonds. In addition, the crystal structure is stabilized by C-H⋯O hydrogen bonds and π-π inter-actions [centroid-centroid distance between benzene rings = 3.5697 (16) Å].
在标题化合物C(20)H(24)O(6)·2C(6)H(3)N(3)O(7)·3H(2)O的冠醚环中，O-C(H₂)-C(H₂)-O扭转角表明乙烯氧基单元呈gauche构象，而C-O-C-C扭转角表明这些片段呈平面状；两个苯环之间的二面角为44.53 (13)°。在两个苦味酸分子中，其中一个硝基从相连的环扭转开。分子通过分子间O-H⋯O氢键沿b轴连接成链。此外，晶体结构通过C-H⋯O氢键和π-π相互作用[苯环之间的质心-质心距离 = 3.5697 (16) Å]得以稳定。
