In the title compound, C16H17ClO, the cyclohexene ring adopts a half-chair conformation and the best plane through the six ring atoms makes a dihedral angle of 6.69 (7)° with the chlorophenyl ring. In the crystal, pairs of C—H⋯O hydrogen bonds link the molecules into centrosymmetric R
2
2(20) dimers. The dimers are linked into an infinite chains along the b-axis direction by further C—H⋯O hydrogen bonds.
Key indicators: single-crystal X-ray study; T = 293 K; mean (C-C) = 0.004 Å; R factor = 0.085; wR factor = 0.283; data-to-parameter ratio = 20.1.The title compound, C 17 H 20 O 2 , has an E conformation about the bridging C C bond. The cyclohexene ring adopts an envelope conformation with the dimethyl-substituted C atom as the flap. Its mean plane makes a dihedral angle of 7.20 (12) with the benzene ring. In the crystal, neighbouring molecules are connected via C-HÁ Á ÁO hydrogen bonds, forming chains running along the a-axis direction.
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