title: Crystal structure of bis-(1-ethyl-pyridinium) dioxonium hexa-cyanidoferrate(II).
abstract: The title compound, (C7H10N)2(H3O)2[Fe(CN)6] or (Etpy)2(H3O)2[Fe(CN)6] (Etpy+is 1-ethyl-pyridinium), crystallizes in the space groupPnnm. The FeIIatom of the [Fe(CN)6]4-anion lies on a site with site symmetry ..2/m, and has an octa-hedral coordination sphere defined by six cyanido ligands. Both the Etpy+and the oxonium cations are located on a mirror plane. In the crystal, electron-donor anions of [Fe(CN)6]4-and electron-acceptor cations of Etpy+are each stacked parallel to thebaxis, resulting in a columnar structure with segregated moieties. The crystal packing is stabilized by a three-dimensional O-H⋯N hydrogen-bonding network between the oxonium ions and the cyanide ligands of [Fe(CN)6]4-.
authors.affiliation: Department of Chemistry and Research Center for Smart Molecules, Rikkyo University, Nishi-Ikebukuro 3-34-1, Toshima-ku, 171-8501 Tokyo, Japan.
authors.forename: Rikako
authors.initials: R
authors.lastname: Tanaka
authors.affiliation: Department of Chemistry and Research Center for Smart Molecules, Rikkyo University, Nishi-Ikebukuro 3-34-1, Toshima-ku, 171-8501 Tokyo, Japan.
authors.forename: Nobuyuki
authors.identifier: https://orcid.org/0000-0003-1022-430X
authors.initials: N
authors.lastname: Matsushita
keywords: crystal structure; ethyl­pyridinium ion; hexa­cyanidoferrate(II); hydrogen bonds; mol­ecular salt; oxonium ion