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EPR Monitoring of Vanadium(IV) Species Formed upon Activation of Vanadium(V) Polyphenolate Precatalysts with AlR2Cl and AlR2Cl/Ethyltrichloroacetate (R = Me, Et) Научная публикация

Журнал Organometallics
ISSN: 0276-7333 , E-ISSN: 1520-6041
Вых. Данные Год: 2009, Том: 28, Номер: 23, Страницы: 6714-6720 Страниц : 7 DOI: 10.1021/om900515h
Ключевые слова OLEFIN POLYMERIZATION CATALYST; CAPPED TRIS(PHENOLATE) COMPLEXES; ETHYLENE POLYMERIZATION; THERMALLY ROBUST; SINGLE-SITE; LIGANDS; PROCATALYSTS; HOMOPOLYMERIZATION; COPOLYMERIZATION; ALUMINUM
Авторы Soshnikov Igor E. 1,2 , Semikolenova Nina V. 1 , Shubin Alexander A. 1,2 , Brylyakov Konstantin P. 1,2 , Zakharov Vladimir A. 1 , Redshaw Carl 3 , Talzi Evgenii P. 1,2
Организации
1 Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russian Federation
2 Novosibirsk State University, 630090, Novosibirsk, Russian Federation
3 School of Chemistry, University of East Anglia, Norwich NR4 7TJ, U.K.

Информация о финансировании (1)

1 Российский фонд фундаментальных исследований 09-03-00485

Реферат: Reactions of the vanadyl polyphenolate complexes {VO[p-tert-butylcalix[4]arene(O)3(OMe)]} (1) and [VO(OArCH2Ar′CH2OAr)]2 (Ar = 4,6-tert-butylphenol; Ar′ = 4-tert-butylphenol) (2) with AlR3 and AlR2Cl, in the absence and in the presence of reactivator (ethyltrichloroacetate, ETA), were monitored by EPR (R = Me, Et). It was shown, that vanadium(IV) complexes with proposed structures L1VIVR(AlR3) and L1VIVR(AlR2Cl) are formed upon interaction of 1 with AlR3 and AlR2Cl, respectively (20 °C, L1 is the initial oxo-calix[4]arene ligand). Similarly, vanadium(IV) complexes with proposed structures L2VIVR(AlR3) and L2VIVR(AlR2Cl) are formed upon interaction of 2 with AlR3 and AlR2Cl (L2 is the initial ligand of 2). The growth of the concentration of L1VIVR(AlR2Cl) and L2VIVR(AlR2Cl) correlates with the increase of the ethylene polymerization activity of the catalyst systems 1,2/AlR2Cl/ETA. It is proposed therefore that vanadium(IV) species of the type L1VIVR(AlR2Cl) and L2VIVR(AlR2Cl) can be the active species (or their immediate precursors) of the catalyst system 1,2/AlR2Cl/ETA.
Библиографическая ссылка: Soshnikov I.E. , Semikolenova N.V. , Shubin A.A. , Brylyakov K.P. , Zakharov V.A. , Redshaw C. , Talzi E.P.
EPR Monitoring of Vanadium(IV) Species Formed upon Activation of Vanadium(V) Polyphenolate Precatalysts with AlR2Cl and AlR2Cl/Ethyltrichloroacetate (R = Me, Et)
Organometallics. 2009. V.28. N23. P.6714-6720. DOI: 10.1021/om900515h WOS Scopus РИНЦ CAPlusCA OpenAlex
Даты:
Поступила в редакцию: 17 июн. 2009 г.
Опубликована online: 11 нояб. 2009 г.
Опубликована в печати: 14 дек. 2009 г.
Идентификаторы БД:
Web of science: WOS:000272560700017
Scopus: 2-s2.0-71949092481
РИНЦ: 15307033
Chemical Abstracts: 2009:1399864
Chemical Abstracts (print): 152:65785
OpenAlex: W1985863077
Цитирование в БД:
БД Цитирований
Web of science 40
Scopus 43
OpenAlex 46
Альметрики: