In the title double proton-transfer salt, CHN ·2CHO , consisting of a 1:2 ratio of 4,4'-(ethene-1,2-diyl)dipyridinium cations ( bipyridinium ethyl-ene) to 2-hy-droxy-3-meth-oxy-benzoate anions (-vanillate), the complete cation is generated by crystallographic inversion symmetry and it is linked to adjacent -vanillate anions by N-H⋯O hydrogen bonds, forming trimolecular assemblies. The trimers are linked by C-H⋯O hydrogen bonds as well as aromatic π-π stacking inter-actions into a three-dimensional network. The anion features an intra-molecular O-H⋯O hydrogen bond.
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| http://dx.doi.org/10.1107/S2414314622005107 | DOI Listing |
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