title: 1,3-Bis(carboxy-meth-yl)imidazolium triiodide 1-carboxyl-atomethyl-3-carboxy-methyl-imidazolium.
abstract: In the title compound, C(7)H(9)N(2)O(4) (+)·I(3) (-)·C(7)H(8)N(2)O(4), the two imidazolium units are hydrogen bonded through the carboxyl groups. The units are further linked via inter-molecular O-H⋯O hydrogen bonding, resulting in a one-dimensional ladder-type structure. As a result, the two carb-oxy groups of each imidazolium unit adopt a cis configuration with respect to the imidazolium ring.
authors.forename: Jinling
authors.initials: J
authors.lastname: Miao
authors.forename: Chunhua
authors.initials: C
authors.lastname: Hu
authors.forename: Haiyan
authors.initials: H
authors.lastname: Chen
authors.forename: Guizhen
authors.initials: G
authors.lastname: Yuan
authors.forename: Yong
authors.initials: Y
authors.lastname: Nie