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C-13 and F-19 NMR study of alpha,beta-difluorostyryl derivatives of transition metal carbonylates. A method of signal assignment based on the carbon-fluorine spin-spin coupling constantsстатья
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Sazonov P.K., Shtern M.M., Oprunenko Y.F., Beletskaya I.P.
- Журнал: Russian Chemical Bulletin
- Том: 47
- Номер: 8
- Год издания: 1998
- Издательство: Springer Nature
- Местоположение издательства: Switzerland
- Первая страница: 1532
- Последняя страница: 1536
- DOI: 10.1007/BF02495604
- Аннотация: The C-13 and F-19 NMR spectra of Z- and E-isomers of beta-X-substituted alpha,beta-difluorostyrenes (X = F, Cl, CpFe(CO)(2), Re(CO)(5), Re-2(CO)(9)Na) were studied. Direct and long-range (across 1-5 bonds) spin-spin coupling constants and the (C-13-C-12) isotope shifts in the F-19 NMR spectra were determined. The study of the C-13 satellites in the F-19 NMR spectra of substituted difluorostyrenes permitted assignment of the C-13 NMR signals of the vinylic carbon atoms. Similarly, the signals in F-19 NMR spectra were assigned based on coupling constants of fluorine with ipso-carbon. These assignments were found to be in good agreement with the data available from the literature (X = F, CI). The developed approach was applied to the elucidation of the structure of Z-PhCF=CClFe(CO)(2)Cp.
- Добавил в систему: Опруненко Юрий Федорович