title: Crystal structure of di-ethyl-ammonium aniline-4-sulfonate anilinium-4-sulfonate.
abstract: The title compound, C4H12N+·C6H6NO3S-·C6H7NO3S, consists of an ion pair and a zwitterionic neutral mol-ecule. The cation adopts an extended conformation [C-C-N-C torsion angles = 177.1 (3) and -178.4 (3)°]. In the crystal, the components are linked by N-H⋯O and N-H⋯N hydrogen bonds, generating a three-dimensional network, which is consolidated by weak C-H⋯O inter-actions.
authors.affiliation: Laboratoire de Chimie Minérale et Analytique, Département de Chimie, Faculté des Sciences et Techniques, Université Cheikh Anta Diop, Dakar, Senegal.
authors.forename: Assane
authors.initials: A
authors.lastname: Toure
authors.affiliation: Laboratoire de Chimie Minérale et Analytique, Département de Chimie, Faculté des Sciences et Techniques, Université Cheikh Anta Diop, Dakar, Senegal.
authors.forename: Libasse
authors.initials: L
authors.lastname: Diop
authors.affiliation: Laboratoire de Chimie Minérale et Analytique, Département de Chimie, Faculté des Sciences et Techniques, Université Cheikh Anta Diop, Dakar, Senegal.
authors.forename: Cheikh Abdoul Khadir
authors.initials: CA
authors.lastname: Diop
authors.affiliation: Department of Chemistry and Biochemistry, University of Notre Dame, 246 Nieuwland, Science Hall, Notre Dame, IN 46557-5670, USA.
authors.forename: Allen G
authors.initials: AG
authors.lastname: Oliver
keywords: aniline­sulfonate; aniline­sulfonic zwitterion; crystal structure; di­ethyl­ammonium cation; hydrogen bonds; three-dimensional structure