Dipole-stabilized carbanions in series of cyclic aldonitrones: Part 4. C-13, N-14 and Li-7 NMR spectra of dipole-stabilized organolithiums derived from a cyclic aldonitrone Научная публикация
| Журнал |
Magnetic Resonance in Chemistry
ISSN: 0749-1581 , E-ISSN: 1097-458X |
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| Вых. Данные | Год: 2001, Том: 39, Номер: 11, Страницы: 681-683 Страниц : DOI: 10.1002/mrc.906 | ||
| Ключевые слова | NMR; Li-7 NMR; C-13 NMR; N-14 NMR; chemical shifts; aldonitrones; lithiation; dipole-stabilized carbanions; carbenoid | ||
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Реферат:
C-13, N-14 and Li-7 NMR spectra of a lithiation product of the cyclic aldonitrone 1,2,2,5,5-pentamethyl-3-imidazoline 3-oxide were obtained. The C-13 NMR spectrum of the lithiated particle exhibits the resonances of the C-4 and C-5 atoms (delta 213 ppm and 73 ppm, respectively) shifted to high frequency relative to the signals of the corresponding nuclei of the starting nitrone (deltaC-4 132 ppm. and deltaC-5 60 ppm). The N-14 NMR spectrum of the particle shows the resonance of the N-3 atom (-115 ppm) at lower frequency in comparison with -74 ppm for the starting nitrone. The calculated chemical shift changes are in good agreement with those observed experimentally. The electronic structure of the lithiated particle is discussed. Copyright (C) 2001 John Wiley & Sons, Ltd.
Библиографическая ссылка:
Voinov M.
, Salnikov G.
, Genaev A.
, Mamatyuk V.
, Shakirov M.
, Grigor'ev I.
Dipole-stabilized carbanions in series of cyclic aldonitrones: Part 4. C-13, N-14 and Li-7 NMR spectra of dipole-stabilized organolithiums derived from a cyclic aldonitrone
Magnetic Resonance in Chemistry. 2001. V.39. N11. P.681-683. DOI: 10.1002/mrc.906 WOS Scopus РИНЦ OpenAlex
Dipole-stabilized carbanions in series of cyclic aldonitrones: Part 4. C-13, N-14 and Li-7 NMR spectra of dipole-stabilized organolithiums derived from a cyclic aldonitrone
Magnetic Resonance in Chemistry. 2001. V.39. N11. P.681-683. DOI: 10.1002/mrc.906 WOS Scopus РИНЦ OpenAlex
Даты:
| Опубликована в печати: | 1 нояб. 2001 г. |
Идентификаторы БД:
| Web of science: | WOS:000171940300003 |
| Scopus: | 2-s2.0-0006347542 |
| РИНЦ: | 13386014 |
| OpenAlex: | W2022331727 |