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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
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)
Авторы Lyakin Oleg Y. 1 , Bryliakov Konstantin P. 1 , Panchenko Valentina N. 1 , Semikolenova Nina V. 1 , Zakharov Vladimir A. 1 , Talsi Evgenii P. 1
Организации
1 Boreskov Institute of Catalysis SB RAS

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
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
Цитирование в БД:
БД Цитирований
Web of science 12
Scopus 13
РИНЦ 13
OpenAlex 12
Альметрики: