Key indicators: single-crystal X-ray study; T = 123 K; mean (C-C) = 0.002 Å; disorder in main residue; R factor = 0.052; wR factor = 0.138; data-to-parameter ratio = 13.0.In the title compound, C 15 H 16 F 3 NO 2 , the dihedral angle between the benzene ring and the conjugated part of the cyclohexene ring is 60.00 (8) . The non-conjugated part of the cyclohexene ring and the trifluoromethyl group are both disordered over two sets of sites with occupancies of 0.835 (2) and 0.165 (2). In the crystal, molecules are linked into chains along [010] by intermolecular N-HÁ Á ÁO hydrogen bonds. Weak intermolecular C-HÁ Á ÁO interactions also occur. Related literature ExperimentalCrystal data

Key indicators: single-crystal X-ray study; T = 295 K; mean (C-C) = 0.006 Å; disorder in main residue; R factor = 0.054; wR factor = 0.150; data-to-parameter ratio = 10.0.In the title compound, C 14 H 16 ClNO, the dihedral angle between the benzene ring and the conjugated part of the cyclohexene ring is 61.7 (2) . Part of the cyclohexene ring and one of the attached methyl groups are disordered over two orientations with occupancies of 0.602 (7) and 0.398 (7). In addition, the crystal studied was a racemic twin [Flack parameter = 0.58 (4)]. In the crystal, the molecules are linked into chains in the b-axis direction by intermolecular N-HÁ Á ÁO hydrogen bonds. C-HÁ Á ÁO and C-HÁ Á ÁCl interactions are also observed. (1993, 1995). For related structures see: Alexander et al. (2010Alexander et al. ( , 2011. Related literature ExperimentalCrystal data