title: Crystal structure of 4-amino-1-benzyl-1,2,4-triazolin-5-one.
abstract: The title compound, C9H10N4O, was obtained unintentionally by hydrolysis of 4-amino-1-benzyl-5-methyl-sulfanyl-1,2,4-triazolium tetra-fluoro-borate in the presence of sodium azide. In the crystal, alternating layers of polar amino-triazolinone and apolar benzene moieties are observed. N-H⋯O hydrogen bonds between the amino and carbonyl groups form infinite chains along [010]. These infinite chains are linked by additional C-H⋯O contacts.
authors.affiliation: University of Innsbruck, Faculty of Chemistry and Pharmacy, Innrain 80, 6020 Innsbruck, Austria.
authors.forename: Gerhard
authors.initials: G
authors.lastname: Laus
authors.affiliation: University of Innsbruck, Institute of Mineralogy and Petrography, Innrain 52, 6020 Innsbruck, Austria.
authors.forename: Volker
authors.initials: V
authors.lastname: Kahlenberg
authors.affiliation: University of Innsbruck, Faculty of Chemistry and Pharmacy, Innrain 80, 6020 Innsbruck, Austria.
authors.forename: Herwig
authors.initials: H
authors.lastname: Schottenberger
keywords: 1,2,4-triazolin-5-one; crystal structure; hydrogen bonding