title: 4-[(5-Bromo-2-hy-droxy-benzyl-idene)amino]-3-ethyl-1H-1,2,4-triazole-5(4H)-thione.
abstract: The title compound, C11H11BrN4OS, crystallized as a racemic twin with two symmetry-independent mol-ecules in the asymmetric unit. The dihedral angles between the benzene and triazole rings of the two independent mol-ecules are 56.41 (18) and 54.48 (18)°. An intra-molecular O-H⋯N hydrogen bond occurs in each mol-ecule. In the crystal, pairs of symmetry-independent mol-ecules are linked by pairs of almost linear N-H⋯S hydrogen bonds, forming cyclic dimers characterized by an R 2 (2)(8) motif. There are weak π-π inter-actions between the benzene rings of symmetry-independent mol-ecules, with a centroid-centroid distance of 3.874 (3) Å.
authors.affiliation: Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular, Engineering of the Education Ministry, Shanxi University, Taiyuan, Shanxi 030006, People's Republic of China.
authors.forename: Cai-Xia
authors.initials: CX
authors.lastname: Yuan
authors.affiliation: Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular, Engineering of the Education Ministry, Shanxi University, Taiyuan, Shanxi 030006, People's Republic of China.
authors.forename: Shu-Fen
authors.initials: SF
authors.lastname: Lan
authors.affiliation: Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular, Engineering of the Education Ministry, Shanxi University, Taiyuan, Shanxi 030006, People's Republic of China.
authors.forename: Xin-Yu
authors.initials: XY
authors.lastname: Liu
authors.affiliation: Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular, Engineering of the Education Ministry, Shanxi University, Taiyuan, Shanxi 030006, People's Republic of China.
authors.forename: Miao-Li
authors.initials: ML
authors.lastname: Zhu
keywords: crystal structure