Experimental Crystal data

disorder in main residue; R factor = 0.057; wR factor = 0.171; data-to-parameter ratio = 12.1. In the title compound, C22H18F2O3, the two fluoro-substituted rings form dihedral angles of 25.89 (15) and 55.00 (12) with the central benzene ring. The ethoxy group in the molecule is disordered over two positions with a site-occupancy ratio of 0.662 (7):0.338 (7). In the crystal, molecules are linked by C— H O hydrogen bonds into chains along the a axis. The crystal packing is further stabilized by C—H and — inter-actions, with centroid–centroid distances of 3.8605 (15) Å. Related literature For a related structure and background to terphenyls, see: Fun et al. (2011); Samshuddin et al. (2011). For the synthesis, see: Kotnis (1990). For reference bond lengths, see: Allen et al. (1987)