Ionothermal synthesis and crystal structure of a new organic–inorganic hybrid compound: catena-poly[bis­(1-ethyl-3-methyl­imidazolium) [hepta-μ-bromido-penta­cuprate(I)]]

The title organic–inorganic hybrid compound crystallizes in the ortho­rhom­bic space group Pnma. The structure is characterized by polymeric inorganic anionic {[Cu₅Br₇]²⁻}_n chains resulting from the edge-sharing of distorted CuBr₄ tetra­hedra. The anions are surrounded by 1-ethyl-3-methyl­imidazolium cations. C—H...Br inter­actions connect the organic cations and inorganic anions.