In the title compound, C(6)H(9)N(2) (+)·C(7)H(4)NO(4) (-)·H(2)O, one amino group of diamino-benzene is protonated while one carb-oxy group of pyridine-2,6-dicarb-oxy-lic acid is deprotonated. In the anion, the CO(2) and CO(2)H groups make dihedral angles of 4.0 (5) and 8.7 (4)° with the pyridine ring. In the crystal, extensive N-H⋯O, N-H⋯N and O-H⋯O hydrogen bonds occur between anions, cations and water mol-ecules.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3212287 | PMC |
| http://dx.doi.org/10.1107/S1600536811025050 | DOI Listing |
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