In the title compound, C 22 H 29 BrN 4 Se 2 , the two Se atoms are directed in opposite directions with respect to the central benzene ring. The C Se bond lengths at 1.848 (5) and 1.851 (5) Å are on the long side for a double bond but shorter than expected for a C-Se single bond. In the crystal, BrÁ Á ÁBr intermolecular interactions [3.4685 (12) Å ] link the molecules into a zigzag chain propagating along the b-axis direction. In addition, there are C-HÁ Á ÁSe intermolecular interactions present, linking the chains to form slabs parallel to the ab plane. One of the two butyl side chains is disordered over two conformations with occupancies of 0.777 (9) and 0.223 (9).
Structure descriptionSelones, the Se-analogues of ketones, have generated considerable interest due to their promising utility in many domains, including homogeneous catalysis (see for example: Prabhu et al. Recently, our group has reported the syntheses and crystal structures of [2 + 2] binuclear palladium(II) and platinum(II) self-assembled 24-membered metallomacrocycles resulting from the reaction Pd(COD)Cl 2 and Pt(COD)Cl 2 with 3,3 0 -[(2-bromo-1,3-phenylene)bis(methylene)]bis(1-mesityl-1,3-dihydro-2H-imidazole-2-selone), and of a mononuclear gold(III) complex formed with AuCl(SMe 2 ) (Rani et al., 2017). Herein, we report on the synthesis and crystal structure of the related title compound, 3,3 0 -[(2-bromo-1,3-phenylene)bis(methylene)]bis(1-butyl-2,3-dihydro-1H-imidazole-2-selone).In the title compound, Fig. 1, one of the two butyl side chains (atoms C11-C14) is disordered over two conformations with occupancies of 0.777 (9)/0.223 (9). The molecule