Different packing motifs in the crystal structures of three mol­ecular salts containing the 2-amino-5-carb­oxy­anilinium cation: C7H9N2O2+·Cl−, C7H9N2O2+·Br− and C7H9N2O2+·NO3−·H2O

Mukombiwa, E.T.; Harrison, W.T.A.

doi:10.1107/S2056989020003163

Acta Crystallographica Section E
Acta Crystallographica
Section E CRYSTALLOGRAPHIC COMMUNICATIONS

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Figure 15
Different structures based on 3,4-diaminobenzoic acid: (a) neutral C₇H₈N₂O₂ molecule as found in DONDUH; (b) zwitterion in VODWIU; (c) quinoid resonance form of the C₇H₉N₂O₂⁺ cation in the title compounds (see text and compare scheme 1); (d) C₇H₇N₂O₂⁻ anion as found in the metal complexes noted in the text.

CRYSTALLOGRAPHIC
COMMUNICATIONS

ISSN: 2056-9890

Volume 76| Part 4| April 2020| Pages 527-533

https://doi.org/10.1107/S2056989020003163

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