Jasinski Jerry P, Butcher Ray J, Veena K, Narayana B, Yathirajan H S
Acta Crystallogr Sect E Struct Rep Online. 2010 Jun 16;66(Pt 7):o1676. doi: 10.1107/S160053681002235X.
In the chalcone title compound, C(18)H(17)BrO(4), the dihedral angle between the mean planes of the 2-bromo- and 3,4,5-trimethoxy-substituted benzene rings is 89.3 (1)°. The angles between the mean plane of the prop-2-en-1-one group and the 2-bromo-phenyl and 3,4,5-trimeth-oxy-phenyl ring planes are 59.7 (1) and 40.5 (8)°, respectively. While no classical hydrogen bonds are present, three weak inter-molecular C-H⋯O inter-actions and weak C-H⋯Br and C-H⋯Cg π-ring stacking inter-actions [C-H⋯Cg distance = 3.377 (2) Å] are observed, which contribute to the stability of crystal packing.
在查尔酮标题化合物C(18)H(17)BrO(4)中，2-溴代苯环和3,4,5-三甲氧基取代苯环的平均平面之间的二面角为89.3 (1)°。2-丙烯-1-酮基团的平均平面与2-溴代苯基和3,4,5-三甲氧基苯基环平面之间的夹角分别为59.7 (1)°和40.5 (8)°。虽然不存在经典氢键，但观察到三种弱分子间C-H⋯O相互作用以及弱C-H⋯Br和C-H⋯Cg π-环堆积相互作用[C-H⋯Cg距离 = 3.377 (2) Å]，这些作用有助于晶体堆积的稳定性。
