Acta Cryst. (2003). E59, o812-o813  [ doi:10.1107/S1600536803010006 ]

2,2'-Diamino-4,4'-bi-1,3-thiazolium fumarate

J.-G. Liu, D.-J. Xu and W.-L. Sun

Abstract: The title compound, C₆H₈N₄S₂²⁺·C₄H₂O₄^2-, consists of a diaminobithiazole (DABT) cation and a fumarate anion. The cation and anion are both located on inversion centers. Both ions display a planar configuration and link to each other through hydrogen bonding between carboxyl and amino groups, as well as through weak C-HO hydrogen bonding between thiazole and carboxyl groups. The C-N(amino) bond distance of 1.323  (4)  Å suggests the existence of electron delocalization between the thiazole ring and the amino group.

Online 16 May 2003

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