An EPR Study of the V(IV) Species Formed Upon Activation of a Vanadyl Phenoxyimine Polymerization Catalyst with AlR3 and AlR2Cl (R ¼ Me, Et)a | Sciact - CRIS-система Института катализа

An EPR Study of the V(IV) Species Formed Upon Activation of a Vanadyl Phenoxyimine Polymerization Catalyst with AlR3 and AlR2Cl (R ¼ Me, Et)a Научная публикация

Журнал

Macromolecular Chemistry and Physics
ISSN: 1022-1352 , E-ISSN: 1521-3935

Вых. Данные

Год: 2009, Том: 210, Номер: 7, Страницы: 542-548 Страниц : 7 DOI: 10.1002/macp.200800556

Ключевые слова

Active species, EPR, Olefin polymerization, Vanadium catalysts

Авторы

Soshnikov Igor E. ^1,2 , Semikolenova Nina V. ¹ , Brylyakov Konstantin P. ^1,2 , Shubin Alexander A. ^1,2 , Zakharov Vladimir A. ¹ , Redshaw Carl ³ , Talsi Evgenii P. ^1,2

Организации

1	G. K. Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russian Federation
2	Novosibirsk State University, Pirogova 2, 630090 Novosibirsk, Russian Federation
3	School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich NR4 7TJ, UK

Информация о финансировании (2)

1	Российский фонд фундаментальных исследований	06-03-32700
2	Royal Society	2006/R4-IJP

Vanadium(IV) complexes formed in the systems L2VIVO/AlR3, L2VIVO/AlR3/ETA, L2VIVO/AlR2Cl, and L2VIVO/AlR2Cl/ETA, where L is a phenoxyimine ligand (Scheme 1), R = Me or Et, and ETA is ethyltrichloroacetate, were monitored by EPR. It was shown, that at 20 °C, V(IV) complexes with proposed structures (L′)VIV(O)(R)(AlR3) are formed in the systems L2VIVO/AlR3 and L2VIVO/AlR3/ETA, whereas complexes with proposed structures (L′)VIV(O)(R)(AlR2Cl) are formed in the systems L2VIVO/AlR2Cl and L2VIVO/AlR2Cl/ETA (L′ is the modified initial ligand). The systems L2VIVO/AlR3/ETA are inert towards polymerization of ethylene, whereas the systems L2VIVO/AlR2Cl/ETA are moderately active in this reaction. The polymerization activity of the systems L2VIVO/AlR2Cl/ETA correlates with the concentration of V(IV) species present in the reaction solution. V(IV) complexes of the type (L′)VIV(O)(R)(AlR2Cl) can be precursors of the active species of polymerization.

Soshnikov I.E. , Semikolenova N.V. , Brylyakov K.P. , Shubin A.A. , Zakharov V.A. , Redshaw C. , Talsi E.P.
An EPR Study of the V(IV) Species Formed Upon Activation of a Vanadyl Phenoxyimine Polymerization Catalyst with AlR3 and AlR2Cl (R ¼ Me, Et)a
Macromolecular Chemistry and Physics. 2009. V.210. N7. P.542-548. DOI: 10.1002/macp.200800556 WOS Scopus РИНЦ CAPlusCA OpenAlex

Поступила в редакцию:	14 нояб. 2008 г.
Принята к публикации:	22 янв. 2009 г.
Опубликована online:	4 мар. 2009 г.
Опубликована в печати:	2 апр. 2009 г.

Web of science:	WOS:000265322100004
Scopus:	2-s2.0-63849122504
РИНЦ:	13613115
Chemical Abstracts:	2009:526766
Chemical Abstracts (print):	151:78477
OpenAlex:	W2169648345

БД	Цитирований
Web of science	26
Scopus	28
РИНЦ	26
OpenAlex	30