2-Bromo-1,3-diisopropyl-4,5-dimethyl-1 H-imidazol-3-ium dicyanidoargentate

Abstract

The title structure, (C 11H 20BrN 2)[Ag(CN) 2)], is built up from an approximately C 2v-symmetric imidazolium cation and a nearly linear dicyanidoargentate anion [N-Ag-N = 176.6(9)° and Ag-C-N = 178.8(9) and 177.2(11)°]. These two constituents are linked by a remarkably short interaction between the Br atom of the imidazolium cation [C-Br = 1.85(3) Å] and one N atom of the cyanidoargentate anion [Br··· N = 2.96(2) Å], which is much less than the sum of the van der Waals radii (3.40 Å). The crystal studied was twinned by merohedry.