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Intramolecular versus intermolecular mechanism of metallotropic rearrangements of chiral chromium tricarbonyl complexes of substituted naphthalenes and other polyaromatic compounds investigated by chiral HPLC of its racemic mixturesстатья
Информация о цитировании статьи получена из
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Дата последнего поиска статьи во внешних источниках: 25 апреля 2017 г.
- Авторы: Oprunenko Y., Malyugina S., Nesterenko P., Mityuk D., Malyshev O.
- Журнал: Journal of Organometallic Chemistry
- Том: 597
- Номер: 1-2
- Год издания: 2000
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 42
- Последняя страница: 47
- Аннотация: Pure enantiomers of chromium tricarbonyl complexes of α- and β-monosubstuted naphthalenes R-C10H7Cr(CO)3 (R=Cl, Me, SiMe3, SnMe3) were separated as pure enantiomers by chiral phase HPLC on a Chiracel OD column. Inter-ring haptotropic rearrangements (IRHRs) (process in which metal shifts between substituted and non-substituted rings) of pure enantiomers were investigated in different solvents in the presence or absence of some solvating additives. It was shown that IRHR proceeds at 85°C in noncoordinative and noncomplexing solvents such as hexafluorobenzene or decane through an intermolecular mechanism without racemization. In aromatic toluene, which can bind with the organometallic group, it proceeds through a partially intramolecular mechanism, leading to considerable racemization (ca. 20%) of the complexes. In the presence of solvating additives (THF, dibutyl ether), almost complete racemization (>90%) was observed. © 2000 Elsevier Science S.A.
- Добавил в систему: Нестеренко Павел Николаевич