Figure 2 View of a hydrogen bonded layer of 3-azaniumylpyridin-1-ium dications and chloride anions in the [110] plane (graph-set descriptors [R_{6}^{3}](18), C21(4) and C21(7) are indicated with green, red and blue numbers; symmetry code: ' 0.5 - x, 0.5 + y, z, '' 1 - x, 0.5 + y, 0.5 - z).  [article HTML]