Ethyl 6-(4-bromo­phen­yl)-4-(4-fluoro­phen­yl)-2-oxocyclo­hex-3-ene-1-carboxyl­ate

摘要

There are two independent mol­ecules in the asymmetric unit of the title compound, C21H18BrFO3, in which the dihedral angles between the fluoro­phenyl and bromo­phenyl groups are 77.0 (1) and 85.8 (1)°. In one of the mol­ecules, two methine C—H groups of the cyclo­hexene ring are disordered over two sets of sites in a 0.53 (2):0.47 (2) ratio. In both mol­ecules, the atoms of the ethyl group were refined as disordered over two sets of sites with occupancies of 0.67 (2):0.33 (2) and 0.63 (4):0.37 (4). The cyclo­hexene rings have slightly distorted sofa conformations in both mol­ecules. In the crystal, C—H⋯O inter­actions link mol­ecules into chains along the b axis.