The ABX3 spin system is studied as a function of applied magnetic field. A method for the determination of the relative signs of J AX and JBX, together with the relative chemical shifts and coupling constants is described. The results are applied to the cis crotonic acid, the trans crotonic acid, its methyl ester, and N-methylformamide. In the latter case it is shown that the relative chemical shift of the A and B protons can be estimated from the field behavior of the X3 group of lines.
| Documento: | Artículo |
| Título: | Nuclear magnetic resonance spectra of the ABX3 type: Field dependence and relative signs of spin-spin coupling constants |
| Autor: | Kowalewski, V.J.; DeKowalewski, D.G. |
| Filiación: | Institute of Physics, University of Uppsala, Uppsala, Sweden Facultad de Ciencias Exactas, Universidad de Buenos Aires, Argentina |
| Año: | 1960 |
| Volumen: | 33 |
| Número: | 6 |
| Página de inicio: | 1794 |
| Página de fin: | 1798 |
| DOI: | http://dx.doi.org/10.1063/1.1731505 |
| Título revista: | The Journal of Chemical Physics |
| ISSN: | 00219606 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00219606_v33_n6_p1794_Kowalewski |
