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Figure 9
The salient intermolecular features in the crystal structure of 4-pyrrolidinopyridinium 4-bromobenzoate 4-bromobenzoic acid (1:1:1) (A = acceptor, H = hydrogen-bond donor).

IUCrJ
Volume 2| Part 5| September 2015| Pages 498-510
ISSN: 2052-2525
https://doi.org/10.1107/S2052252515010854