title: (1RS,6SR)-Ethyl 4-(2,4-dichloro-phen-yl)-6-(4-fluoro-phen-yl)-2-oxocyclo-hex-3-ene-1-carboxyl-ate.
abstract: There are two symmetry-independent mol-ecules in the asymmetric unit of the title compound, C(21)H(17)Cl(2)FO(3). Both these mol-ecules are very similar: the normal probability plots for bond lengths, angles and even for torsion angles show that the differences are of a statistical nature. A pseudocentre of symmetry is located between the symmetry-independent mol-ecules at [0.245 (1), 0.535 (19), 0.909 (1)]. The cyclo-hexene rings have slightly distorted sofa conformations in both mol-ecules and the two benzene rings are inclined by dihedral angles of 61.33 (14) and 62.85 (14)°. In the crystal, relatively short inter-molecular C-H⋯O inter-actions join mol-ecules into homomolecular (i.e. ⋯AAA⋯ and ⋯BBB⋯) chains along the b axis. These chains are inter-connected by further heteromolecular C-H⋯O inter-actions.
authors.forename: Grzegorz
authors.initials: G
authors.lastname: Dutkiewicz
authors.forename: B
authors.initials: B
authors.lastname: Narayana
authors.forename: K
authors.initials: K
authors.lastname: Veena
authors.forename: H S
authors.initials: HS
authors.lastname: Yathirajan
authors.forename: Maciej
authors.initials: M
authors.lastname: Kubicki