4-[4-(Hept-yloxy)benzo-yloxy]phenyl 2-oxo-7-tri-fluoro-methyl-2H-chromene-3-carboxyl-ate.

The title compound, C31H27F3O7, is a liquid crystal and exhibits enanti-otropic SmA and nematic phase transitions. In the crystal, the the 2H-chromene ring system makes dihedral angles of 54.46 (17) and 7.

3-(2-Bromo-acet-yl)-6-fluoro-2H-chromen-2-one.

The non-H atoms of the title compound, C(11)H(6)BrFO(3), are essentially coplanar (r.m.s.