Abou Akoun, Djandé Abdoulaye, Danger Grégoire, Saba Adama, Kakou-Yao Rita
Laboratoire de Cristallographie et Physique Moléculaire, UFR SSMT, Université de Cocody, 22 BP 582 Abidjan 22, Côte d'Ivoire.
Acta Crystallogr Sect E Struct Rep Online. 2012 Dec 1;68(Pt 12):o3438-9. doi: 10.1107/S1600536812047666. Epub 2012 Nov 24.
In the title mol-ecule, C17H12O5, the chromen-2-one ring and the 4-meth-oxy-benzoate side chain are inclined to one another at a dihedral angle of 69.82 (9)°. The crystal structure features parallel sheets of centrosymmetric R2(2)(6) dimers joined by a C(7) chain, resulting in centrosymetric tetra-mers of hydrogen-bonded mol-ecules with graph-set motif R4(4)(40). These centrosymetric tetra-mers are connected by a pair of hydrogen bonds described by an R2(2)(8) ring motif and a C(7) chain via C-H⋯O inter-actions. In the structure, there are also π-π stacking inter-actions between chromene benzene and the six-membered heterocyclic rings [centroid-centroid distance = 3.691 (2) Å] and weak C=O⋯π inter-actions [O⋯(ring centroid) distance = 3.357 (3) Å].
在标题分子C₁₇H₁₂O₅中,色烯-2-酮环与4-甲氧基苯甲酸酯侧链之间的二面角为69.82 (9)°。晶体结构的特征是由C(7)链连接的中心对称R₂(2)(6)二聚体形成的平行片层,从而产生具有R₄(4)(40)图形集模式的氢键分子中心对称四聚体。这些中心对称四聚体通过由R₂(2)(8)环模式和C(7)链描述的一对氢键经由C—H⋯O相互作用相连。在该结构中,色烯苯环与六元杂环之间还存在π-π堆积相互作用[质心-质心距离 = 3.691 (2) Å]以及弱的C=O⋯π相互作用[O⋯(环质心)距离 = 3.357 (3) Å]。