In the title compound, C21H16BrNO3, the mean planes of the anthracene tricycle and isoxazole ring are inclined to each other at a dihedral angle of 72.12 (7)°. The carboxy group is slightly out of the isoxazole mean plane, with a maximum deviation of 0.070 (5) Å for the carbonyl O atom. In the crystal, pairs of weak C-H⋯O hydrogen bonds link the molecules into dimers, and weak C-H⋯N interactions further link these dimers into corrugated layers parallel to the bc plane.
|Acta Crystallographica Section E: Structure Reports Online
|Published - Dec 2013