title: 13C and 15N NMR chemical shifts of 1-(2',4'-dinitrophenyl) and 1-(2',4',6'-trinitrophenyl) pyrazoles in the solid state and in solution.
abstract: The (13)C and (15)N CPMAS NMR spectra of 18 pyrazoles substituted at position 1 by dinitrophenyl and trinitrophenyl (picryl) groups have been recorded. To help in the assignments, some of these compounds were studied in DMSO-d(6) solution. Phenomena such as the conformation of the N-aryl groups and broadening of splittings due to quadrupolar nuclei are discussed.
authors.affiliation: Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, UNED, Senda del Rey 9, E-28040 Madrid, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Angeles García
authors.forename: Rosa M
authors.initials: RM
authors.lastname: Claramunt
authors.forename: José
authors.initials: J
authors.lastname: Elguero
mesh_terms: D002247:Carbon Isotopes; D004136:Dinitrobenzenes / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009587:Nitrogen Isotopes; D044367:Phase Transition; D011720:Pyrazoles / Q000737:chemistry*; D012996:Solutions; D014301:Trinitrobenzenes / Q000737:chemistry*
chemical_list: D002247:Carbon Isotopes; D004136:Dinitrobenzenes; D009587:Nitrogen Isotopes; D011720:Pyrazoles; D012996:Solutions; D014301:Trinitrobenzenes