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Lookup NU author(s): Kathy Guille,
Emeritus Professor Bill CleggORCiD
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Very small crystals of anhydrous guanine (systematic name: 2-amino-l,7-dihydro-6H-purin-6-one), C5H5N5O, were obtained from an attempted solvothermal synthesis of a potassium complex. Data were collected at 120 K using a synchrotron radiation source. There is one essentially planar molecule in the asymmetric unit. Molecules are linked to each other by N-H⋯N and N-H⋯O hydrogen bonds to form sheets, between which there are π-π stacking interactions. This crystal structure determination demonstrates conclusively that, in the absence of any solvent or other molecules, guanine exists as the amino-keto tautomer in the solid state, with H atoms attached to N1 and N7 (purine numbering), unlike its monohydrate, which has H atoms on N1 and N9. © 2006 International Union of Crystallography.
Author(s): Guille K, Clegg W
Publication type: Article
Publication status: Published
Journal: Acta Crystallographica Section C: Crystal Structure Communications
ISSN (print): 0108-2701
ISSN (electronic): 1600-5759
PubMed id: 16891735
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