title: 5-Hy-droxy-2-nitro-benzaldehyde thio-semicarbazone (HNBATSC).
abstract: The asymmetric unit of the title compound, C8H8N4O3S, consists of two independent mol-ecules. Each mol-ecule is approximately planar with dihedral angles of 8.71 (3) and 1.50 (2)° between the aromatic ring and the thio-semicarbazide moiety while the NO2 group makes dihedral angles of 29.27 (3) and 17.78 (3)° with the benzene ring. In the crystal, the molecules are linked by N-H⋯S, O-H⋯O and N-H⋯O hydrogen bonds, forming two-dimensional networks parallel to (100).
authors.affiliation: Department of Chemistry, Sri Venkateswara University, Tirupati 517 502, India.
authors.forename: M Sivasankar
authors.initials: MS
authors.lastname: Reddy
authors.affiliation: Department of Chemistry, Chaitanya Bharathi Institute of Technology, Gandipet, Hyderabad 500 075, India.
authors.forename: Y
authors.initials: Y
authors.lastname: Sarala
authors.affiliation: Department of Chemistry, Sri Venkateswara University, Tirupati 517 502, India.
authors.forename: M
authors.initials: M
authors.lastname: Jagadeesh
authors.affiliation: School of Chemistry, University of Hyderabad, Hyderabad 500 046, India.
authors.forename: Samar K
authors.initials: SK
authors.lastname: Das
authors.affiliation: Department of Chemistry, Sri Venkateswara University, Tirupati 517 502, India.
authors.forename: Varada Reddy
authors.initials: VR
authors.lastname: Ammireddy
keywords: Crystallographic studies; Evolution of mol­ecular structure; Thio­semicarbazone; Triclinic symmetry; crystal structure