Poly[3,3′-diethyl-1,1′-(ethane-1,2-di­yl)diimidazolium [tetra-μ-bromido-­diargentate(I)]]

The asymmetric unit of the title salt, {(C(12)H(20)N(4))[Ag(2)Br(4)]}(n), contains one-half of a substituted imidazolium cation, one Ag(+) and two Br(−) ions. The cation is completed by crystallographic inversion symmetry. The crystal structure is made up from polymeric sheets of {[AgBr(2)](−)}(n) anions extending parallel to (100). The basic building unit of the anion is a slightly distorted AgBr(4) tetra­hedron. A four- and 12-membered ring system is formed by corner sharing of the AgBr(4) tetra­hedra. The imidazolium cations are located between the anionic sheets and partly protrude into the voids defined by the 12-membered rings.