EPR Identification of Zr(III) Complexes Formed upon Interaction of (2-PhInd)2ZrCl2 and rac-Me2Si(1-Ind)2ZrCl2 with MAO and MMAO Научная публикация
| Журнал |
Macromolecular Chemistry and Physics
ISSN: 1022-1352 , E-ISSN: 1521-3935 |
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| Вых. Данные | Год: 2007, Том: 208, Номер: 11, Страницы: 1168-1175 Страниц : 8 DOI: 10.1002/macp.200700066 | ||
| Ключевые слова | Deactivation, ESR/EPR, Metallocene catalysts, Methyl-aluminoxane, Zirconium(III) | ||
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| Организации |
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Информация о финансировании (1)
| 1 | Российский фонд фундаментальных исследований | 06-03-32700 |
Реферат:
Reactions of 1 and 2 with MAO and MMAO were monitored by EPR. It was found that MMAO is a stronger reducing agent than MAO. 1 is more prone to reduction than 2. The reduction of ZrIV to ZrIII seems to be the essential pathway of some zirconocene catalysts' deactivation. ZrIII species with the following proposed structures can be identified in the 1/MMAO system: (2-PhInd)2ZrIII(iBu), (2-PhInd)2ZrIII(µ-Cl)2AliBu2, (2-PhInd)2ZrIII(µ-Cl)(iBu)AliBu2, and [(2-PhInd)2ZrIII]+[Me-MAO]−. The degree of reduction of ZrIV species determined by EPR in the catalytic system 2/MMAO can be masked by the formation of diamagnetic ZrIII/ZrIII dimers. Addition of monomers to the 2/MAO system promotes reduction ot the zirconium species.
Библиографическая ссылка:
Lyakin O.Y.
, Bryliakov K.P.
, Panchenko V.N.
, Semikolenova N.V.
, Zakharov V.A.
, Talsi E.P.
EPR Identification of Zr(III) Complexes Formed upon Interaction of (2-PhInd)2ZrCl2 and rac-Me2Si(1-Ind)2ZrCl2 with MAO and MMAO
Macromolecular Chemistry and Physics. 2007. V.208. N11. P.1168-1175. DOI: 10.1002/macp.200700066 WOS Scopus РИНЦ CAPlusCA OpenAlex
EPR Identification of Zr(III) Complexes Formed upon Interaction of (2-PhInd)2ZrCl2 and rac-Me2Si(1-Ind)2ZrCl2 with MAO and MMAO
Macromolecular Chemistry and Physics. 2007. V.208. N11. P.1168-1175. DOI: 10.1002/macp.200700066 WOS Scopus РИНЦ CAPlusCA OpenAlex
Даты:
| Поступила в редакцию: | 5 февр. 2007 г. |
| Принята к публикации: | 21 мар. 2007 г. |
| Опубликована online: | 29 мая 2007 г. |
| Опубликована в печати: | 4 июн. 2007 г. |
Идентификаторы БД:
| Web of science: | WOS:000247305100002 |
| Scopus: | 2-s2.0-34547947251 |
| РИНЦ: | 13553140 |
| Chemical Abstracts: | 2007:700237 |
| Chemical Abstracts (print): | 147:277687 |
| OpenAlex: | W2133993403 |