3,3'-Bis(3-methoxy-benz-yl)-1,1'-ethyl-enediimidazolium dibromide.

In the title compound, C(24)H(28)N(4)O(2) (2+)·2Br(-), the imidazolium cation is located on an inversion centre. The two imidazole rings are parallel to each other, whereas the imidazole and benzene rings make a dihedral angle of 77.25 (16)°. Non-classical inter-molecular C-H⋯Br hydrogen bonds link the imidazolium cations and the bromide anions into a three-dimensional network.

3,3'-Bis(4-fluoro-benz-yl)-1,1'-ethyl-enediimidazolium tribromidocuprate(I).

The title compound, (C(22)H(22)F(2)N(4))[CuBr(3)], crystallizes with the cation situated on an inversion center and the anion on a twofold rotation axis along one Cu-Br bond. The two imidazole rings are in an anti configuration. The anion has a trigonal planar coordination geometry.