Theoretical and Experimental

R factor = 0.032; wR factor = 0.100; data-to-parameter ratio = 15.4. In the title molecule, C17H11BrN2, the planes of the anthracene ring system [maximum deviation from the mean plane = 0.036 (3) Å] and the imidazole ring form a dihedral angle of 85.14 (14). In the crystal, weak C—H N and C— H Br hydrogen bonds link the molecules into double chains propagating along [011]. In addition, – stacking interactions between pairs of benzene rings are observed, with centroid– centroid distances of 3.7968 (17) and 3.8496 (16) Å. Related literature For the preparation of the title compound, see: Lee et al. (2011). For the structure of a related compound, see: Boyer et al. (1993)