Ma (2007). Experimental Crystal data

R factor = 0.048; wR factor = 0.100; data-to-parameter ratio = 13.9. In the title compound, C15H10ClNO3, a substituted chalcone, the dihedral angle between the benzene rings is 5.1 (7). The nitro group makes a dihedral angle of 12.5 (3) with the benzene ring to which it is attached. In the crystal, weak C— H O interactions link the molecules into a one-dimensional array along [010]. The crystal studied was an inversion twin, with a refined ratio for the twin components of 0.6060 (9):0.3939 (1). Related literature For the biochemical activity of chalcones, see: Dimmock et al. (1999). For different chalcone derivatives, see: Samshuddin e