title: 2,2'-Diamino-4,4'-bi-1,3-thia-zolium bis-(3-nitro-benzoate).
abstract: In the title salt, C(6)H(8)N(4)S(2) (2+)·2C(7)H(4)NO(4) (-), the diprotonated diamino-bithia-zole dication is located on an inversion center. The carboxyl-ate group of the anion is twisted with respect to the benzene ring, with a dihedral angle of 13.6 (4)°. N-H⋯O hydrogen bonds involving the amino and ammonium groups of the dication and the carboxyl-ate functionality of the anion generate supra-molecular chains in the crystal.
authors.affiliation: Department of Chemistry, Shanghai University, People's Republic of China.
authors.forename: Bing-Xin
authors.initials: BX
authors.lastname: Liu
authors.forename: Yan-Ping
authors.initials: YP
authors.lastname: Yu
authors.forename: Yuan-Yuan
authors.initials: YY
authors.lastname: Lin
authors.forename: Mei
authors.initials: M
authors.lastname: Du