Crystal structure and Hirshfeld surface analysis of 2-amino-3-hydroxypyridin-1-ium 6-methyl-2,2,4-trioxo-2H,4H-1,2,3-oxathiazin-3-ide

Abstract

The asymmetric unit of the title compound, C5H7N2O+center dot C4H4NO4S-, contains one cation and one anion. The 6-methyl-2,2,4-trioxo-2H,4H-1,2,3-oxathiazin-3-ide anion adopts an envelope conformation with the S atom as the flap. In the crystal, the anions and cations are held together by N-H center dot center dot center dot O, N-H center dot center dot center dot N, O-H center dot center dot center dot O and C-H center dot center dot center dot O hydrogen bonds, thus forming a three-dimensional structure. The Hirshfeld surface analysis and fingerprint plots reveal that the crystal packing is dominated by O center dot center dot center dot H/H center dot center dot center dot O (43.1%) and H center dot center dot center dot center dot H (24.2%) contacts.