title: A hydrogen-bonded chain of rings in 5-amino-1-(4-methoxybenzoyl)-3-methylpyrazole and a three-dimensional hydrogen-bonded framework in 5-amino-3-methyl-1-(2-nitrobenzoyl)pyrazole.
abstract: The molecules of 5-amino-1-(4-methoxybenzoyl)-3-methylpyrazole, C(12)H(13)N(3)O(2), (I), and 5-amino-3-methyl-1-(2-nitrobenzoyl)pyrazole, C(11)H(10)N(4)O(3), (II), both contain intramolecular N-H...O hydrogen bonds. The molecules of (I) are linked into a chain of rings by a combination of N-H...N and N-H...pi(arene) hydrogen bonds, while those of (II) are linked into a three-dimensional framework structure by N-H...N and C-H...O hydrogen bonds.
authors.affiliation: Grupo de Investigación de Compuestos Heterociclícos, Departamento de Química, Universidad de Valle, AA 25360, Colombia.
authors.forename: Jairo
authors.initials: J
authors.lastname: Quiroga
authors.forename: Jaime
authors.initials: J
authors.lastname: Portilla
authors.forename: John N
authors.initials: JN
authors.lastname: Low
authors.forename: Justo
authors.initials: J
authors.lastname: Cobo
authors.forename: Christopher
authors.initials: C
authors.lastname: Glidewell
mesh_terms: D006574:Heterocyclic Compounds, 2-Ring / Q000737:chemistry*; D006860:Hydrogen Bonding; D015394:Molecular Structure; D009574:Nitro Compounds / Q000737:chemistry*; D011720:Pyrazoles / Q000737:chemistry*
chemical_list: C527865:5-amino-1-(4-methoxybenzoyl)-3-methylpyrazole; C527866:5-amino-3-methyl-1-(2-nitrobenzoyl)pyrazole; D006574:Heterocyclic Compounds, 2-Ring; D009574:Nitro Compounds; D011720:Pyrazoles