Navegar

Colección

Datos Estadísticas

Artículo

La versión final de este artículo es de uso interno. El editor solo permite incluir en el repositorio el artículo en su versión post-print. Por favor, si usted la posee enviela a
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

An additivity relationship for chemical shifts similar to that found in the literature for coupling constants has been tested in eleven disubstituted pyridines. The chemical shifts of these disubstituted pyridines were measured in different solvents at different concentrations and extrapolated to infinite dilution. In order to compute the "effects" of the different substituents, the chemical shifts of the corresponding monosubstituted pyridines and of pyridine were measured in the same solvents at different concentrations. These chemical shifts were extrapolated to infinite dilution. In most cases it was found that the extrapolated chemical shifts for disubstituted pyridines are in good agreement with those calculated using the additivity relationship. Only in a few cases was it found that the additivity scheme does not hold. © 1974.

Registro:

Documento: Artículo
Título:Additivity scheme in nmr chemical shifts of disubstituted pyridines
Autor:Contreras, R.H.; de Kowalewski, D.G.
Filiación:Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Buenos AiresArgentina
Año:1974
Volumen:23
Número:2
Página de inicio:209
Página de fin:214
DOI: http://dx.doi.org/10.1016/0022-2860(74)85035-0
Título revista:Journal of Molecular Structure
Título revista abreviado:J. Mol. Struct.
ISSN:00222860
CODEN:JMOSB
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222860_v23_n2_p209_Contreras

Referencias:

  • Castellano, Kostelnik, (1967) Tetrahedron Lett., 51, p. 5211
  • Cox, (1969) Spectrochim. Acta, 25, p. 1189. , Part A
  • Hayamizu, Yamamoto, (1968) J. Mol. Spectrosc., 25, p. 422
  • de Kowalewski, Buitrago, Yommi, (1972) J. Mol. Struct., 11, p. 195
  • Aksnes, Kronhaug, NMR Spectral Parameters of Seven Di-substituted Anilines. (1971) Acta Chemica Scandinavica, 25, p. 1871
  • de Kowalewski, Contreras, (1973) J. Mol. Struct., 16, p. 451
  • Malinowski, (1972) J. Phys. Chem., 76, p. 1593. , and the papers cited therein
  • Kowalewski, (1969) J. Mol. Spectrosc., 30, p. 531
  • Bothner-By, Castellano, (1966) LAOCN3, , Mellon Institute Pittsburgh, Pa

Citas:

---------- APA ----------
Contreras, R.H. & de Kowalewski, D.G. (1974) . Additivity scheme in nmr chemical shifts of disubstituted pyridines. Journal of Molecular Structure, 23(2), 209-214.
http://dx.doi.org/10.1016/0022-2860(74)85035-0
---------- CHICAGO ----------
Contreras, R.H., de Kowalewski, D.G. "Additivity scheme in nmr chemical shifts of disubstituted pyridines" . Journal of Molecular Structure 23, no. 2 (1974) : 209-214.
http://dx.doi.org/10.1016/0022-2860(74)85035-0
---------- MLA ----------
Contreras, R.H., de Kowalewski, D.G. "Additivity scheme in nmr chemical shifts of disubstituted pyridines" . Journal of Molecular Structure, vol. 23, no. 2, 1974, pp. 209-214.
http://dx.doi.org/10.1016/0022-2860(74)85035-0
---------- VANCOUVER ----------
Contreras, R.H., de Kowalewski, D.G. Additivity scheme in nmr chemical shifts of disubstituted pyridines. J. Mol. Struct. 1974;23(2):209-214.
http://dx.doi.org/10.1016/0022-2860(74)85035-0