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Abstract:

The long-range spin-spin coupling constants between the methyl and the ring protons in several methyl pyridines have been determined, with their signs. The INDOR technique was used for this purpose and a systematic method was developed applicable to these spin systems, which were all of the ABCX3 type. It was found that 6JH,CH3 and4JH,CH3 are negative, while 5JH,CH3 is positive, with |4J|>|6J|>|5J|. These results show the same trend as shown by investigations of previous authors in other cyclic compounds. © 1972.

Registro:

Documento: Artículo
Título:The signs of the long-range spin-spin coupling constants in methyl pyridines as determined by the INDOR technique
Autor:Kowalewski, V.J.; Contreras, R.H.
Filiación:Department de Física, Facultad de Ciencias Exactas y Naturales, Buenos Aires, Argentina
Año:1972
Volumen:8
Número:1
Página de inicio:101
Página de fin:113
DOI: http://dx.doi.org/10.1016/0022-2364(72)90028-5
Título revista:Journal of Magnetic Resonance (1969)
ISSN:00222364
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222364_v8_n1_p101_Kowalewski

Referencias:

  • Kowalewski, (1969) J. Mol. Spectrosc., 31, p. 256
  • Kowalewski, (1969) J. Mol. Spectrosc., 30, p. 531
  • Kowalewski, de Kowalewski, Ferrá, (1966) J. Mol. Spectrosc., 20, p. 203
  • Rodmar, Forsén, Gestblom, Gronowitz, Hofnman, Signs of the Side-chain Spin Couplings in Furans. II. 2-Methyl- and 3-Methylfuran, 2-Furfurylidenemalononitrile, and N-(2-Furfurylidene)aniline. (1965) Acta Chemica Scandinavica, 19, p. 485
  • Gestblom, Mathiasson, The Signs of the Side-chain Couplings in Methylthiophenes as Determined by Multiple Resonance Techniques. (1964) Acta Chemica Scandinavica, 18, p. 1905
  • Kotowycz, Schaefer, DOUBLE AND TRIPLE RESONANCE EXPERIMENTS ON 2-BROMO-5-CHLOROTOLUENE: SIGNS OF THE RING AND RING-METHYL PROTON COUPLING CONSTANTS (1966) Canadian Journal of Chemistry, 44, p. 2743
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Citas:

---------- APA ----------
Kowalewski, V.J. & Contreras, R.H. (1972) . The signs of the long-range spin-spin coupling constants in methyl pyridines as determined by the INDOR technique. Journal of Magnetic Resonance (1969), 8(1), 101-113.
http://dx.doi.org/10.1016/0022-2364(72)90028-5
---------- CHICAGO ----------
Kowalewski, V.J., Contreras, R.H. "The signs of the long-range spin-spin coupling constants in methyl pyridines as determined by the INDOR technique" . Journal of Magnetic Resonance (1969) 8, no. 1 (1972) : 101-113.
http://dx.doi.org/10.1016/0022-2364(72)90028-5
---------- MLA ----------
Kowalewski, V.J., Contreras, R.H. "The signs of the long-range spin-spin coupling constants in methyl pyridines as determined by the INDOR technique" . Journal of Magnetic Resonance (1969), vol. 8, no. 1, 1972, pp. 101-113.
http://dx.doi.org/10.1016/0022-2364(72)90028-5
---------- VANCOUVER ----------
Kowalewski, V.J., Contreras, R.H. The signs of the long-range spin-spin coupling constants in methyl pyridines as determined by the INDOR technique. 1972;8(1):101-113.
http://dx.doi.org/10.1016/0022-2364(72)90028-5