Received 2 April 2011
In the title molecule, C22H13Br2NO2, the three benzene rings are arranged in a propeller-like fashion around the central malemide ring, making dihedral angles of 48.2 (4), 30.2 (4) and 34.8 (4)° with the malemide ring. The C-C single-bond lengths connecting benzene groups and maleimide are significantly shorter [C-C = 1.468 (9) and 1.478 (9) Å] than a typical Csp3-Csp3 single bond, indicating partial conjugation between the benzene and the maleimide. A weak nonclassical C-HO hydrogen bond helps to stabilize the crystal structure.
Data collection: APEX2 (Bruker, 2005); cell refinement: SAINT (Bruker, 2001); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: RK2272 ).
Financial support from the Fundamental Research Funds for the Central Universities in NWSUAF (QN2009048) and the Excellent Young Funds 211020712 is greatly appreciated.
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