title: Crystal structure of 4,4'-di-bromo-2',5'-dimeth-oxy-[1,1'-biphen-yl]-2,5-dione (BrHBQBr).
abstract: In the title compound, C14H10Br2O4, the dihedral angle between the aromatic rings is 67.29 (19)°. Both meth-oxy-group C atoms lie close to the plane of their attached ring [deviations = -0.130 (4) and 0.005 (5) Å]. In the crystal, mol-ecules pack in a centrosymmetric fashion and inter-act via a mixture of weak π-π stacking inter-actions [centroid-centoid separations = 4.044 (2) and 4.063 (3) Å], weak C-H⋯O hydrogen bonding, and Br⋯Br halogen bonding. This induces a geometry quite different than that predicted by theory.
authors: Department of Chemistry, The University of Alabama, Box 870336, Tuscaloosa, AL 35487-0336, USA.
authors: Joseph E
authors: JE
authors: Meany
authors: Department of Chemistry, The University of Alabama, Box 870336, Tuscaloosa, AL 35487-0336, USA.
authors: Steven P
authors: SP
authors: Kelley
authors: Department of Chemistry, The University of Alabama, Box 870336, Tuscaloosa, AL 35487-0336, USA.
authors: Robert M
authors: RM
authors: Metzger
authors: Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, Quebec, Canada, H3A 0B8.
authors: Robin D
authors: RD
authors: Rogers
authors: Department of Chemistry, The University of Alabama, Box 870336, Tuscaloosa, AL 35487-0336, USA.
authors: Stephen A
authors: SA
authors: Woski
keywords: Br⋯Br halogen bonding; crystal structure; hemibi­quinone; hydrogen bonding; mol­ecular rectifier; π–π stacking inter­actions