title: 3-Hydroxy-6-[(4-hydroxyphenylamino)methylene]cyclohexa-2,4-dienone and 2-hydroxy-6-[(4-hydroxyphenylamino)methylene]cyclohexa-2,4-dienone.
abstract: The title compounds, both C(13)H(11)NO(3), exist as the keto-amine tautomers, and the formal hydroxyl H atoms, which display strong intramolecular hydrogen bonds, are located on the N atoms. This is a verification of the preference for the keto-amine tautomeric form in the solid state. The 2-hydroxy isomer has two independent molecules, with the molecules linked by intramolecular N-H.O and O-H.O and intermolecular O-H.O hydrogen bonds into three-dimensional networks.
authors.affiliation: Department of Physics, Ondokuz Mayis University, TR-55139, Samsun, Turkey. kosarbasak@hotmail.com
authors.forename: Başak
authors.initials: B
authors.lastname: Koşar
authors.forename: Orhan
authors.initials: O
authors.lastname: Büyükgüngör
authors.forename: Ciğdem
authors.initials: C
authors.lastname: Albayrak
authors.forename: Mustafa
authors.initials: M
authors.lastname: Odabaşoğlu