Abstract
In the crystal of the title salt, C
6
H
7
N
2
S
+
·I
−
, inversion-related cations form an
R
2
2
(8) dimer linked by a pair of N—H⋯S hydrogen bonds. Pairs of iodide anions are located between adjacent cation dimers and are linked to them by way of N—H⋯I hydrogen bonds. This results in zigzag chains propagating in [001] lying parallel to the
bc
plane.