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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(3):199-203
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Abstract:

Inter‐proton long‐range and ring couplings were measured in o‐anisaldehyde and in seven disubstituted anisoles. In order to investigate the transmission mechanisms of long‐range couplings with the methoxy group, partially restricted molecular orbital (PRMO) calculations were carried out within the FPT‐INDO method on o‐anisaldehyde. σ‐ and π‐electron, and through‐space transmitted components were separated. For the energetically favoured trans‐OMe conformation a through‐space component was found for the couplings of the methyl protons with the ortho‐proton, and it was found that its sign, as well as its magnitude, depends on their relative positions. If free rotation, however, is assumed for the methyl group, the averaged value for this coupling constant is negative. Copyright © 1981 Heyden & Son Ltd.

Registro:

Documento: Artículo
Título:Transmission mechanisms of inter‐proton long‐range couplings in substituted anisoles
Autor:de Kowalewski, D.G.; Contreras, R.H.; Engelmann, A.R.; Facelli, J.C.; Durán, J.C.
Filiación:Departamento de Física, Facultad de Ciencias Exactas Y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 1, Buenos Aires, 1428, Argentina
Año:1981
Volumen:17
Número:3
Página de inicio:199
Página de fin:203
DOI: http://dx.doi.org/10.1002/mrc.1270170314
Título revista:Organic Magnetic Resonance
Título revista abreviado:Magn. Reson. Chem.
ISSN:00304921
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00304921_v17_n3_p199_deKowalewski

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Citas:

---------- APA ----------
de Kowalewski, D.G., Contreras, R.H., Engelmann, A.R., Facelli, J.C. & Durán, J.C. (1981) . Transmission mechanisms of inter‐proton long‐range couplings in substituted anisoles. Organic Magnetic Resonance, 17(3), 199-203.
http://dx.doi.org/10.1002/mrc.1270170314
---------- CHICAGO ----------
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" . Organic Magnetic Resonance 17, no. 3 (1981) : 199-203.
http://dx.doi.org/10.1002/mrc.1270170314
---------- MLA ----------
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" . Organic Magnetic Resonance, vol. 17, no. 3, 1981, pp. 199-203.
http://dx.doi.org/10.1002/mrc.1270170314
---------- VANCOUVER ----------
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. Magn. Reson. Chem. 1981;17(3):199-203.
http://dx.doi.org/10.1002/mrc.1270170314