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Figure 5
Hirshfeld surface of the 3-carb­oxy-1-methyl­pyridinium cation plotted over dnorm (ad) or shape index (e). The neighboring atoms are shown in ball-and-stick mode for clarity. The surface regions with the strongest inter­molecular inter­actions are shown in red.

Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890
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