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

Date Published: June 01, 2012

Publisher: International Union of Crystallography

Author(s): Jian-Zhong Huo, Zhi-Xiang Zhao, Men-Chao Shi, Hui-Long Li, Qing-Xiang Liu.


The title compound, {(C13H22N4)[Ag2I4]}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(1H-imidazol-3-ium) cation, the dihedral angle between the imidazole rings is 49.3 (1)°. In the [Ag2I4]2− anion, each AgI atom is bonded to three iodide anions, the two AgI atoms and two of the iodides forming Ag2I2 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 Ag2I2 units into {[Ag2I4]2−}n polymeric chains via Ag—I bonds.

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For background to the chemistry of imidazolium compounds, see: Wasserscheid & Keim (2000 ▶); Migowski & Dupont (2007 ▶). For some applications of imidazolium salts, see: Leclercq & Schmitzer (2009 ▶); Petkovic et al. (2011 ▶); Chen et al. (2006 ▶). For other polymeric chain structures formed via Ag—I bonds, see: Chen & Liu (2003 ▶).