Ethyl 2-(3,5-difluorophenyl)quinoline-4-carboxylate: a second triclinic polymorph

Abstract

The title compound, C18H13F2NO2, is a polymorph of the structure reported by Sunithaet al.[Acta Cryst.(2015), E71, o341–o342]. Both compounds crystallize in the triclinic space groupP-1. The principal difference between the two polymorphs lies in the orientation of the carboxylate substituents with respect to the planes of the quinoline ring systems. In the crystal, the packing features C—H...O hydrogen bonds together with short C—F...π and π–π interactions [inter-centroid distances of 3.8199 (11), 3.6825 (12) and 3.8722 (13) Å].