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Reaction of C60 with KMnF4 - Isolation and characterization of a new isomer of C60F8 and re-evaluation of the structures of C60F7(CF3) and the known isomer of C60F8статья
Информация о цитировании статьи получена из
Web of Science,
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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: Goryunkov Alexey A., Ivan E Kareev, Ioffe Ilya N., Kuvychko Igor V., Markov Vitaliy Y., Goldt Ilya V., Pimenova Anna S., Serov Mihail G., Avdoshenko Stanislav M., Khavrel Pavel A., Sidorov Lev N., Lebedkin Sergey F., Mazej Zoran, Zemva Boris, Strauss Steven H., Boltalina Olga V.
- Журнал: Journal of Fluorine Chemistry
- Том: 127
- Номер: 10
- Год издания: 2006
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 1423
- Последняя страница: 1435
- DOI: 10.1016/j.jfluchem.2006.06.016
- Аннотация: The volatile fluorofullerene products of high-temperature reactions Of C-60 with the ternary manganese(III, IV) fluorides KMnF4, KMnF5, A(2)MnF(6) (A(+) = Li+, K+, Cs+), and K3MnF6 were monitored as a function of reaction temperature, reaction time, and stoichiometric ratio by in situ Knudsen-cell mass spectrometry. When combined with fluorofullerene product ratios from larger-scale (bulk) screening reactions with the same reagents, an optimized set of conditions was found that yielded the greatest amount Of C60F8 (KMnF4/C-60 mol ratio 28-30, 470 degrees C, 4-5 h). Two isomers of C60F8 were purified by HPLC, one of which has not been previously reported. Quantum chemical calculations at the DFr level combined with ID and 2D F-19 NMR, FTIR, and Fr-Raman spectroscopy indicate that the C60F8 isomer previously reported to be 1,2,3,8,9,12,15,16-C60F8 is actually 1,2,3,6,9,12,15,18-C60F8, making it the first high-temperature fluorofullerene with non-contiguous fluorine atoms. The new isomer, which was found to be l,2,7,8,9,12,13,14-C60F8, is predicted to be 5.5 U mol(-1) more stable than l,2,3,6,9,12,15,18-C60F8 at the DFr level. In addition, new DFr calculations and spectroscopic data indicate that the compound previously isolated from the high-temperature reaction of C-60 and K2PtF6 and reported to be 16-CF3-1,2,3,8,9,12,15-C60F7 is actually 18-CF3-1,2,3,6,8,12,15-C60F7(0 (c) 2006 Published by Elsevier B.V.
- Добавил в систему: Марков Виталий Юрьевич