Crystal structure of 2-bromo-1,4-dihy­droxy-9,10-anthra­quinone

In an attempt to brominate 1,4-diprop­oxy-9,10-anthra­quinone, a mixture of products, including the title compound, C₁₄H₇BrO₄, was obtained. The mol­ecule is essentially planar (r.m.s. deviation = 0.029 Å) and two intra­molecular O—H...O hydrogen bonds occur. In the crystal, the mol­ecules are linked by weak C—H...O hydrogen bonds, Br...O contacts [3.240 (5) Å], and π–π stacking inter­actions [shortest centroid–centroid separation = 3.562 (4) Å], generating a three-dimensional network.