Date Published: May 01, 2009
Publisher: International Union of Crystallography
Author(s): Wagee A. Yehye, Azhar Ariffin, Noorsaadah Abdul Rahman, Seik Weng Ng.
The dianion of the title salt, 2C5H6N+·C12H6N2O4S22−, lies on a special position of 2 site symmetry that relates one thionicotinate part to the other, and the dihedral angle between the niotinate planes is 89.2 (2)°. The pyridinium cations are hydrogen bonded to the carboxylate group by way of N—H⋯O links.
The structure is a non-merohedral twin; for the program to model twinned crystal structures, see: Spek (2003 ▶). For 1,1′-dithio-2,2′-dinicotinic acid, see: Zhu et al. (2002 ▶). For the methyl, ethyl and n-butyl esters, see: Cindrić et al. (2001 ▶); Toma et al. (2004 ▶).