Fun Hoong-Kun, Arshad Suhana, Ubaradka S R, Shetty Prakash, Isloor Arun M
Acta Crystallogr Sect E Struct Rep Online. 2012 Aug 1;68(Pt 8):o2317-8. doi: 10.1107/S1600536812029194. Epub 2012 Jul 4.
The asymmetric unit of the title compound, C(20)H(17)NO(4), consists of two crystallographically independent mol-ecules. In one of the mol-ecules, the central benzene ring forms dihedral angles of 2.26 (6) and 58.68 (6)° with the terminal benzene rings and the dihedral angle between the terminal benzene rings is 56.45 (6)°. The corresponding values for the other mol-ecule are 35.17 (6), 70.97 (6) and 69.62 (6)°, respectively. In the crystal, an inversion dimer linked by a pair of C-H⋯O hydrogen bonds occurs for one of the unique mol-ecules. C-H⋯π and π-π [centroid-centroid distances = 3.7113 (8) and 3.7216 (7) Å] inter-actions link the components into a three-dimensional network.
标题化合物C(20)H(17)NO(4)的不对称单元由两个晶体学独立的分子组成。在其中一个分子中,中心苯环与末端苯环形成的二面角分别为2.26 (6)°和58.68 (6)°,末端苯环之间的二面角为56.45 (6)°。另一个分子的相应值分别为35.17 (6)°、70.97 (6)°和69.62 (6)°。在晶体中,其中一个独特分子通过一对C-H⋯O氢键形成一个反演二聚体。C-H⋯π和π-π [质心-质心距离 = 3.7113 (8) 和3.7216 (7) Å] 相互作用将这些组分连接成一个三维网络。