Short inter­molecular N—Br...O=C contacts in 1,3-dibromo-5,5-dimethyl­imidazolidine-2,4-dione

In the title compound, C₅H₆Br₂N₂O₂, all atoms except for the methyl group lie on a mirror plane in the space group Pnma (No. 62). All bond lengths are normal and the five-membered ring is planar by symmetry. Two short inter­molecular N—Br...O=C contacts [Br...O = 2.787 (2) and 2.8431 (19) Å] are present, originating primarily from the O-atom lone pairs donating electron density to the anti­bonding orbitals of the N—Br bonds (delocalization energy transfers 3.27 and 2.11 kcal mol⁻¹). The total stabilization energies of the Br...O inter­actions are 3.4828 and 2.3504 kcal mol⁻¹.