title: Crystal structure of 3-bromo-4-di-methyl-amino-1-methyl-1,2,4-triazol-5(4H)-one.
abstract: The title compound, C5H9BrN4O, was obtained as a minor by-product in the synthesis of 4-di-methyl-amino-1-methyl-1,2,4-triazolin-5-one. Except for the methyl groups of the 4-dimethylamino moiety, all the non-H atoms lie on a crystallographic mirror plane." In the crystal, the mol-ecules are linked by C-Br⋯O=C inter-actions [Br⋯O = 2.877 (2) Å, C-Br⋯O = 174.6 (1)°] into infinite chains in the c-axis direction.
authors.affiliation: Faculty of Chemistry and Pharmacy, University of Innsbruck, 6020 Innsbruck, Austria.
authors.forename: Gerhard
authors.initials: G
authors.lastname: Laus
authors.affiliation: Faculty of Chemistry and Pharmacy, University of Innsbruck, 6020 Innsbruck, Austria.
authors.forename: Thomas
authors.initials: T
authors.lastname: Gelbrich
authors.affiliation: Faculty of Chemistry and Pharmacy, University of Innsbruck, 6020 Innsbruck, Austria.
authors.forename: Klaus
authors.initials: K
authors.lastname: Wurst
authors.affiliation: Faculty of Chemistry and Pharmacy, University of Innsbruck, 6020 Innsbruck, Austria.
authors.forename: Herwig
authors.initials: H
authors.lastname: Schottenberger
keywords: 1,2,4-triazol-5(4H)-one; Br⋯O=C inter­actions; crystal structure; halogen inter­actions