catena-Poly[3,3′-diethyl-1,1′-(propane-1,3-di­yl)di(1 H-imidazol-3-ium) [silver(I)-di-μ-iodido-silver(I)-di-μ-iodido]]

Abstract

The title compound, {(C ₁₃H ₂₂N ₄)[Ag ₂I ₄]} _n , was prepared by reaction of 1,3-bis­( N-ethyl­imidazolium-1-yl)propane iodide with silver (I) oxide. In the 3,3′-diethyl-1,1′-(propane-1,3-di­yl)di(1 H-imidazol-3-ium) cation, the dihedral angle between the imidazole rings is 49.3 (1)°. In the [Ag ₂I ₄] ²⁻ anion, each Ag ^I atom is bonded to three iodide anions, the two Ag ^I atoms and two of the iodides forming Ag ₂I ₂ square-planar (r.m.s. deviation = 0.01 Å) units·The remaining two iodides, which are placed on opposite sides of the square, together with their centrosymmetric counterparts, link the square-planar Ag ₂I ₂ units into {[Ag ₂I ₄] ²⁻} _n polymeric chains via Ag—I bonds.