Crystal structure of disodium 2-amino-6-oxo-6,7-dihydro-1 H-purine-1,7-diide heptahydrate

Dvir Gur, Linda J.W. Shimon, S. Parkin

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


In the title compound, disodium 2-amino-6-oxo-6,7-dihydro-1H-purine-1,7-diide heptahydrate, 2Na+·C5H3N5O2-·7H2O, the structure is composed of alternating (100) layers of guanine molecules and hydrated Na+ ions. Within the guanine layer, the molecules are arranged in centrosymmetric pairs, with a partial overlap between the guanine rings. In this compound, guanine exists as the amino-keto tautomer from which deprotonation from N1 and N7 has occurred (purine numbering). There are no direct interactions between the Na+ cations and the guanine anions. Guanine molecules are linked to neighboring water molecules by O - H⋯N and O - H⋯O hydrogen bonds into a network structure.

Original languageEnglish
Pages (from-to)281-283
Number of pages3
JournalActa Crystallographica Section E: Structure Reports Online
Issue number3
StatePublished - Mar 1 2015


  • Crystal structure
  • Guanine salt
  • Hydrogen bonds
  • Nucleobase

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics


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