A purple odyssey: synthesis and structure of 3-amino-4-hy­dr­oxy-6-oxo­cyclo­hexa-2,4-dien-1-iminium chloride monohydrate

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In the cation of the title hydrated mol­ecular salt, C6H7N2O2+·Cl-·H2O, the six-membered ring shows unequal bond lengths consistent with delocalization of electrons over two separate 6[pi] systems with single bonds between them. In the crystal, the components are linked by N-H...Cl, N-H...O, O-H...Cl and O-H...O hydrogen bonds, generating double layers propagating in (100).
Original languageEnglish
Pages (from-to)604-607
Number of pages4
JournalActa Crystallographica Section E: Crystallographic Communications
Issue number5
Publication statusPublished - 1 May 2016



  • conjugation
  • anti-aromatic
  • hydrogen bonds
  • layered structure
  • crystal structure

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