In the title adduct, C5H5NO·C8H12O4, the heterocycle exists in its zwitterionic form. The cyclo-hexane ring exhibits a chair conformation with the carb-oxy-lic acid groups in equatorial and axial orientations. In the crystal, mol-ecules are linked through charge-assisted O-H⋯O(-), N(+)-H⋯O(-) and N(+)-H⋯O hydrogen bonds, and an additional series of C-H⋯O contacts, giving a pleated two-dimensional hydrogen-bonded network parallel to (-204).
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3629634 | PMC |
| http://dx.doi.org/10.1107/S160053681300754X | DOI Listing |
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