title: 2-Amino-5-trifluoromethyl-1,3,4-thiadiazole and a redetermination of 2-amino-1,3,4-thiadiazole, both at 120 K: chains of edge-fused R(2)(2)(8) and R(4)(4)(10) rings, and sheets of R(2)(2)(8) and R(6)(6)(20) rings.
abstract: Molecules of 2-amino-5-trifluoromethyl-1,3,4-thiadiazole, C3H2F3N3S, are linked by two independent N-H...N hydrogen bonds into sheets of alternating R(2)(2)(8) and R(6)(6)(20) rings, while the molecules of the unsubstituted 2-amino-1,3,4-thiadiazole, C2H3N3S, are linked, again by two independent N-H...N hydrogen bonds, but into chains of edge-fused R(2)(2)(8) and R(4)(4)(10) rings.
authors.affiliation: Complexo Tecnológico de Medicamentos Farmanguinhos, Avenida Comandante Guaranys 47, Jacarepaguá, Rio de Janeiro, RJ, Brazil.
authors.forename: Nubia
authors.initials: N
authors.lastname: Boechat
authors.forename: Sabrina B
authors.initials: SB
authors.lastname: Ferreira
authors.forename: Christopher
authors.initials: C
authors.lastname: Glidewell
authors.forename: John N
authors.initials: JN
authors.lastname: Low
authors.forename: Janet M S
authors.initials: JM
authors.lastname: Skakle
authors.forename: Solange M S V
authors.initials: SM
authors.lastname: Wardell