Bis(1,3-diethylbenzimidazolium) tetrabromidomercurate(II)

In the title compound, (C11H15N2)2[HgBr4], the tetracoordinated HgII center of the complex anion adopts a distorted tetrahedral geometry [Hg—Br = 2.5755 (8)–2.623 (11) Å and Br—Hg—Br = 103.78 (19)–116.4 (3)°]. One of the Br atoms is disordered over two sites [site-occupancy factors = 0.51 (6) and 0.49 (6)]. The N—C—N angles in the cations are 110.7 (6) and 111.4 (7)°. In the crystal packing, a supramolecular chain is formed via both weak intermolecular C—H...Br hydrogen bonds and π–π aromatic ring stacking interactions [centroid–centroid separation = 3.803 (1) Å].