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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).

ISSN: 2056-9890
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