title: A unique tautomer of 1-n-hexyl-3-phenyl-1H-pyrazol-5-ol.
abstract: In the title compound, C15H20N2O, the bond distances and angles are consistent with the presence of the hydroxy tautomer. This tautomer was unambiguously determined by the clear presence of a H atom bonded to oxygen, as well as the total absence of any residual electron density around the N atom in the heterocycle, thus precluding any possibility of desmotropism.
authors.affiliation: Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción, Chile. jbelmar@udec.cl
authors.forename: Julio
authors.initials: J
authors.lastname: Belmar
authors.forename: Claudio
authors.initials: C
authors.lastname: Jiménez
authors.forename: C
authors.initials: C
authors.lastname: Ruiz-Pérez
authors.forename: F S
authors.initials: FS
authors.lastname: Delgado
authors.forename: Ricardo
authors.initials: R
authors.lastname: Baggio