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Abstract:

The absence of HH couplings between the methoxy group and the ring protons observed in 2‐methoxy‐, 2,6‐dimethoxy‐ and 2‐methoxy‐6‐chloropyridines is interpreted in terms of a cis conformation between the methyl fragment and the nitrogen ring atom. Other data, taken from the current literature, support this conclusion. Copyright © 1982 Wiley Heyden Ltd.

Registro:

Documento: Artículo
Título:A proton NMR analysis of the OCH3 group conformation in 2‐methoxypyridines
Autor:Contreras, R.H.; Facelli, J.C.; de Kowalewski, D.G.
Filiación:Departmento de Física, Facultad de Ciencias Exactas Y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 1, Buenos Aires, 1428, Argentina
Año:1982
Volumen:20
Número:1
Página de inicio:40
Página de fin:41
DOI: http://dx.doi.org/10.1002/mrc.1270200111
Título revista:Organic Magnetic Resonance
Título revista abreviado:Magn. Reson. Chem.
ISSN:00304921
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00304921_v20_n1_p40_Contreras

Referencias:

  • de Kowalewski, D.G., Contreras, R.H., Engelmann, A.R., Facelli, J.C., Durán, J.C., Transmission mechanisms of inter-proton long-range couplings in substituted anisoles (1981) Organic Magnetic Resonance, 17, p. 199
  • Contreras, R.H., de Kowalewski, D.G., Facelli, J.C., (1982) J. Mol. Struct., 81, p. 147
  • Konschin, H., Tylli, H., Grundfelt—Forsius, C., (1981) J. Mol. Struct., 77, p. 51
  • Pople, J.A., Gordon, M., (1967) J. Am. Chem. Soc., 89, p. 4253
  • Sutton, L.E., (1965) Tables of Interatomic Distances, , Chemical Society, London
  • de Kowalewski, D.G., Contreras, R.H., (1973) J. Mol. Struct., 16, p. 451
  • Nagy, P., Kiss, A.I., Lopata, A., (1981) J. Mol. Struct. Theochem., 86, p. 41
  • O'Gorman, J.M., Shand, W., Schomaker, V., An Electron Diffraction Investigation of Methyl Formate, Methyl Acetate and Methyl Chloroformate (1950) Journal of the American Chemical Society, 72, p. 4222
  • Curl, R.F., (1959) J. Chem. Phys., 30, p. 1529
  • Wennerström, H., Forsén, S., Roos, B., (1972) J. Phys. Chem., 76, p. 2430
  • Clementi, E., (1968) Chem. Rev., 68, p. 341
  • Pietrzycki, W., Tomasik, P., Sucharda—Sobczyk, A., (1981) J. Mol. Struct., 73, p. 49
  • Cheng, C.L., Ritchie, G.L.D., Conformations of the formyl-, acetyl-, and benzoyl-pyridines (1973) Journal of the Chemical Society, Perkin Transactions 2, 2, p. 1461
  • Kozerski, L., von Philipsborn, W., 15N chemical shifts as a conformational probe in enaminones A variable temperature study at natural isotope abundance (1981) Organic Magnetic Resonance, 17, p. 306
  • Jakobsen, H.J., Yang, P.I., Brey, W.S., Natural abundance proton-coupled15N NMR spectra of pyridines observed from proton polarization transfer experiments (1981) Organic Magnetic Resonance, 17, p. 290
  • Jones, D.W., (1978) Specialist Periodical Report, NMR, 8, p. 20. , ed. by, R. J. Abraham, Chemical Society, London
  • Kowalewski, V.J., (1969) J. Mol. Spectrosc., 30, p. 531
  • Bothner‐By, A.A., Castellano, S., (1966) LAOCOON3, , Mellon Institute, Pittsburgh, PA

Citas:

---------- APA ----------
Contreras, R.H., Facelli, J.C. & de Kowalewski, D.G. (1982) . A proton NMR analysis of the OCH3 group conformation in 2‐methoxypyridines. Organic Magnetic Resonance, 20(1), 40-41.
http://dx.doi.org/10.1002/mrc.1270200111
---------- CHICAGO ----------
Contreras, R.H., Facelli, J.C., de Kowalewski, D.G. "A proton NMR analysis of the OCH3 group conformation in 2‐methoxypyridines" . Organic Magnetic Resonance 20, no. 1 (1982) : 40-41.
http://dx.doi.org/10.1002/mrc.1270200111
---------- MLA ----------
Contreras, R.H., Facelli, J.C., de Kowalewski, D.G. "A proton NMR analysis of the OCH3 group conformation in 2‐methoxypyridines" . Organic Magnetic Resonance, vol. 20, no. 1, 1982, pp. 40-41.
http://dx.doi.org/10.1002/mrc.1270200111
---------- VANCOUVER ----------
Contreras, R.H., Facelli, J.C., de Kowalewski, D.G. A proton NMR analysis of the OCH3 group conformation in 2‐methoxypyridines. Magn. Reson. Chem. 1982;20(1):40-41.
http://dx.doi.org/10.1002/mrc.1270200111