title: 7-Amino-5-methyl-2-phenyl-6-(phenyldiazenyl)pyrazolo[1,5-a]pyrimidine crystallizes with Z' = 2: pseudosymmetry and the formation of complex sheets built from N-H...N and C-H...pi(arene) hydrogen bonds.
abstract: The title compound, C(19)H(16)N(6), crystallizes with Z' = 2 in the space group P2(1)/n. The two molecules in the selected asymmetric unit are approximate mirror images of one another; most corresponding pairs of atoms are related by an approximate half-cell translation along [100]. Each molecule contains an intramolecular N-H...N hydrogen bond and the molecules are linked into complex sheets by a combination of two intermolecular N-H...N and four C-H...pi(arene) hydrogen bonds. Comparisons are made with some other 7-aminopyrazolo[1,5-a]pyrimidines.
authors.affiliation: Grupo de Investigación en Compuestos Bio-orgánicos, Departamento de Química, Universidad de los Andes, Cra. 1E No. 18A-10, Edificio H, AA 4976, Bogotá DC, Colombia.
authors.forename: Jaime
authors.initials: J
authors.lastname: Portilla
authors.forename: Diego
authors.initials: D
authors.lastname: Estupiñan
authors.forename: Justo
authors.initials: J
authors.lastname: Cobo
authors.forename: Christopher
authors.initials: C
authors.lastname: Glidewell
mesh_terms: D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D015394:Molecular Structure; D011720:Pyrazoles / Q000737:chemistry*; D011743:Pyrimidines / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: C548563:7-amino-5-methyl-2-phenyl-6-(phenyldiazenyl)pyrazolo(1,5-a)pyrimidine; D011720:Pyrazoles; D011743:Pyrimidines