Received 28 November 2011
The title compound, [Cu4Br4(C21H22Br2N4)4], features a macrocyclic Cu4L4 ring system in which each CuI atom is coordinated by one bromide ion and two N atoms from two 2,2'-dimethyl-1,1'-[2,2-bis(bromomethyl)propane-1,3-diyl]di(1H-benzimidazole) (L) ligands in a distorted trigonal-planar geometry. The L ligands adopt either a cis or trans configuration. The asymmetric unit contains one half-molecule with the center of the macrocycle located on a crystallographic center of inversion. Each bromide ion binds to a CuI atom in a terminal mode and is oriented outside the ring. The macrocycles are interconnected into a two-dimensional network by - interactions between benzimidazole groups from different rings [centroid-centroid distance = 3.803 (5) Å.
Data collection: CrystalClear (Rigaku, 2007); cell refinement: CrystalClear; data reduction: CrystalClear; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: CrystalClear (Rigaku, 2007) and DIAMOND (Brandenburg, 1998); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: IM2344 ).
The authors are indebted to Jiangsu University for supporting this work.
Bai, H.-Y., Xia, D.-C. & Ma, J.-F. (2010). Z. Kristallogr. New Cryst. Struct. 225, 101-102.
Brandenburg, K. (1998). DIAMOND. Crystal Impact GbR, Bonn, Germany.
Li, T. & Du, S.-W. (2006). Acta Cryst. E62, m1812-m1813.
Peng, R., Li, M. & Li, D. (2010). Coord. Chem. Rev. 254, 1-18.
Qi, Y., Luo, F., Batten, S. R., Che, Y.-X. & Zheng, J.-M. (2008). Cryst. Growth Des. 8, 2806-2813.
Rigaku (2007). CrystalClear. Rigaku/MSC Inc., The Woodlands, Texas, USA.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Zhu, H.-F., Fan, J., Okamura, T.-A., Sun, W.-Y. & Ueyama, N. (2005). Cryst. Growth Des. 5, 289-294.