title: 1,1'-Diethyl-4,4'-bipyridine-1,1'-diium bis(1,1,3,3-tetracyano-2-ethoxypropenide): multiple C-H...N hydrogen bonds form a complex sheet structure.
abstract: In the title salt, C14H18N2(2+) · 2C9H5N4O(-), the 1,1'-diethyl-4,4'-bipyridine-1,1'-diium dication lies across a centre of inversion in the space group P21/c. In the 1,1,3,3-tetracyano-2-ethoxypropenide anion, the two independent -C(CN)2 units are rotated, in conrotatory fashion, out of the plane of the central propenide unit, making dihedral angles with the central unit of 16.0(2) and 23.0(2)°. The ionic components are linked by C-H...N hydrogen bonds to form a complex sheet structure, within which each cation acts as a sixfold donor of hydrogen bonds and each anion acts as a threefold acceptor of hydrogen bonds.
authors.affiliation: Département de Technologie, Faculté de Technologie, Université 20 Août 1955-Skikda, BP 26, Route d'El-Hadaiek, Skikda 21000, Algeria.
authors.forename: Zouaoui
authors.initials: Z
authors.lastname: Setifi
authors.affiliation: Unité de Recherche de Chimie de l'Environnement et Moléculaire Structurale (CHEMS), Université Constantine 1, Constantine 25000, Algeria.
authors.forename: Fouzia
authors.initials: F
authors.lastname: Lehchili
authors.affiliation: Laboratoire de Chimie, Ingénierie Moléculaire et Nanostructures (LCIMN), Université Ferhat Abbas Sétif 1, Sétif 19000, Algeria.
authors.forename: Fatima
authors.initials: F
authors.lastname: Setifi
authors.affiliation: Unité de Recherche de Chimie de l'Environnement et Moléculaire Structurale (CHEMS), Université Constantine 1, Constantine 25000, Algeria.
authors.forename: Adel
authors.initials: A
authors.lastname: Beghidja
authors.affiliation: Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: Seik Weng
authors.initials: SW
authors.lastname: Ng
authors.affiliation: School of Chemistry, University of St Andrews, Fife KY16 9ST, Scotland.
authors.forename: Christopher
authors.initials: C
authors.lastname: Glidewell
mesh_terms: D000838:Anions / Q000737:chemistry*; D002412:Cations / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D015394:Molecular Structure; D009570:Nitriles / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*
chemical_list: C000589831:1,1'-diethyl-4,4'-bipyridine-1,1'-diium bis(1,1,3,3-tetracyano-2-ethoxypropenide); D000838:Anions; D002412:Cations; D009570:Nitriles; D011725:Pyridines
keywords: 1,1,3,3-tetracyano-2-ethoxypropenide; 4,4′-bipyridine-1,1′-diium; crystal structure; hydrogen-bonded sheets; polynitrile anions