Additivity scheme in nmr chemical shifts of disubstituted pyridines
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 in...
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| Formato: | Capítulo de libro |
| Lenguaje: | Inglés |
| Publicado: |
1974
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| Acceso en línea: | Registro en Scopus DOI Handle Registro en la Biblioteca Digital |
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| LEADER | 03315caa a22004217a 4500 | ||
|---|---|---|---|
| 001 | PAPER-1435 | ||
| 003 | AR-BaUEN | ||
| 005 | 20250205085322.0 | ||
| 008 | 190411s1974 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-49549158501 | |
| 030 | |a JMOSB | ||
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 100 | 1 | |a Contreras, Rubén Horacio | |
| 245 | 1 | 0 | |a Additivity scheme in nmr chemical shifts of disubstituted pyridines |
| 260 | |c 1974 | ||
| 270 | 1 | 0 | |m Contreras, R.H. |
| 504 | |a Castellano, Kostelnik, (1967) Tetrahedron Lett., 51, p. 5211 | ||
| 504 | |a Cox, (1969) Spectrochim. Acta, 25, p. 1189. , Part A | ||
| 504 | |a Hayamizu, Yamamoto, (1968) J. Mol. Spectrosc., 25, p. 422 | ||
| 504 | |a de Kowalewski, Buitrago, Yommi, (1972) J. Mol. Struct., 11, p. 195 | ||
| 504 | |a Aksnes, Kronhaug, NMR Spectral Parameters of Seven Di-substituted Anilines. (1971) Acta Chemica Scandinavica, 25, p. 1871 | ||
| 504 | |a de Kowalewski, Contreras, (1973) J. Mol. Struct., 16, p. 451 | ||
| 504 | |a Malinowski, (1972) J. Phys. Chem., 76, p. 1593. , and the papers cited therein | ||
| 504 | |a Kowalewski, (1969) J. Mol. Spectrosc., 30, p. 531 | ||
| 504 | |a Bothner-By, Castellano, (1966) LAOCN3, , Mellon Institute Pittsburgh, Pa | ||
| 506 | |2 openaire |e Política editorial | ||
| 520 | 3 | |a 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. |l eng | |
| 536 | |a Detalles de la financiación: * This work was sponsored in part by the Consejo National T&&as (Argentina). | ||
| 593 | |a Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Buenos AiresArgentina | ||
| 700 | 1 | |a de Kowalewski, D.G. | |
| 773 | 0 | |d 1974 |g v. 23 |h pp. 209-214 |k n. 2 |p J. Mol. Struct. |x 00222860 |w (AR-BaUEN)CENRE-222 |t Journal of Molecular Structure | |
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| 856 | 4 | 0 | |u https://doi.org/10.1016/0022-2860(74)85035-0 |x doi |y DOI |
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| 961 | |a paper_00222860_v23_n2_p209_Contreras |b paper |c PE | ||
| 962 | |a info:eu-repo/semantics/article |a info:ar-repo/semantics/artículo |b info:eu-repo/semantics/publishedVersion | ||
| 963 | |a VARI | ||