4-[4-(Hept­yloxy)benzo­yloxy]phenyl 2-oxo-7-tri­fluoro­methyl-2H-chromene-3-carboxyl­ate

The title compound, C₃₁H₂₇F₃O₇, is a liquid crystal and exhibits enanti­otropic SmA and nematic phase transitions. In the crystal, the the 2H-chromene ring system makes dihedral angles of 54.46 (17) and 7.79 (16)°, respectively, with the central benzene ring and 4-(hept­yloxy)benzene ring. The three F atoms of the –CF₃ group are disordered over two sets of sites, with an occupancy ratio of 0.62 (3):0.38 (3). The crystal structre features two pairs of C—H...O hydrogen bonds, which form inversion dimers and generate R₂²(10) and R₂²(30) ring patterns. C—H...O inter­actions along [100] and C—H...π inter­actions futher consolidate the packing, leading to a three-dimensional network.