title: (1RS,6SR)-Ethyl 4-(4-chloro-phen-yl)-6-(4-fluoro-phen-yl)-2-oxocyclo-hex-3-ene-1-carboxyl-ate toluene hemisolvate.
abstract: In the crystal structure of the title compound, C(21)H(18)ClFO(3)·0.5C(7)H(8), the toluene solvent mol-ecules occupy special positions on centres of symmetry, and consequently are disordered across this site. The cyclo-hexene ring has a slightly distorted sofa conformation; the two benzene rings are inclined by 72.90 (7)° and their planes make dihedral angles of 30.09 (10) (chloro-phen-yl) and 88.13 (6)° (fluoro-phen-yl) with the approximately planar part of the cyclo-hexenone ring [maximum deviation from plane through five atoms is 0.030 (2) Å, the sixth atom is 0.672 (3)Å out of this plane]. Weak inter-molecular C-H⋯O and C-H⋯X (X = F, Cl) inter-actions join mol-ecules into a three-dimensional structure. Also, a relatively short and directional C-Cl⋯F-C contact is observed [Cl⋯F = 3.119 (2) Å, C-Cl⋯F = 157.5 (2)° and C-F⋯Cl 108.3 (2)°]. The solvent mol-ecules fill the voids in the crystal structure and are kept there by relatively short and directional C-H⋯π 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