EPR Spectroscopic Study of Ni(I) Species in the Catalyst System for Ethylene Polymerization Based on α-diimine Ni(II) Complex Activated by MMAO | Sciact - CRIS-система Института катализа

EPR Spectroscopic Study of Ni(I) Species in the Catalyst System for Ethylene Polymerization Based on α-diimine Ni(II) Complex Activated by MMAO Научная публикация

Журнал

Journal of Organometallic Chemistry
ISSN: 0022-328X

Вых. Данные

Год: 2019, Том: 880, Страницы: 267-271 Страниц : 5 DOI: 10.1016/j.jorganchem.2018.11.021

Ключевые слова

Monovalent nickel; Ethylene polymerization; EPR; Active species; N,N-α-diimine ligand

Авторы

Soshnikov Igor E. ^1,2 , Semikolenova Nina V. ¹ , Bryliakov Konstantin P. ^1,2 , Antonov Artem A. ^1,2 , Sun Wen-Hua ^3,4 , Talsi Evgenii P. ^1,2

Организации

1	Siberian Branch of the Russian Academy of Sciences, Boreskov Institute of Catalysis, 630090, Novosibirsk, Pr. Lavrentieva, 5, Russian Federation
2	The Ministry of Education and Science of the Russian Federation, Novosibirsk State University 630090, Novosibirsk, Pirogova Street, 2, Russian Federation
3	Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
4	CAS Research/Education Center for Excellence in Molecular Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China

Информация о финансировании (3)

1	Российский фонд фундаментальных исследований National Natural Science Foundation of China	18-53-80031 / 51861145303
2	National Natural Science Foundation of China	5171102116
3	Chinese Academy of Sciences

Using EPR spectroscopy, nickel(I) species formed in the catalyst system 1/MMAO for ethylene polymerization has been investigated (1 = LNiBr2, L = 1,4-bis-2,4,6-dimethylphenyl-2,3-dimethyl-1,4-diazabuta-1,3-dien). It has been shown that diamagnetic cationic complex [LNiII-tBu]+[MeMMAO]– (2) persists in system 1/MMAO at low temperatures, but rapidly decays at 25 °C to give new EPR active species 3 (major product) and 4 (minor product). Species 3 is a nickel(I) complex with the proposed structure [LNiI(S)]+[MeMMAO]– (S = solvent), whereas 4 is L(•−)AlMe2 species. Upon the addition of ethylene, complex 3 partially reversibly converts into the adduct [LNiI(C2H4)]+[MeMMAO]– (5). After ethylene consumption, species 3 restores its original concentration.

Soshnikov I.E. , Semikolenova N.V. , Bryliakov K.P. , Antonov A.A. , Sun W-H. , Talsi E.P.
EPR Spectroscopic Study of Ni(I) Species in the Catalyst System for Ethylene Polymerization Based on α-diimine Ni(II) Complex Activated by MMAO
Journal of Organometallic Chemistry. 2019. V.880. P.267-271. DOI: 10.1016/j.jorganchem.2018.11.021 WOS Scopus РИНЦ РИНЦ РИНЦ CAPlus OpenAlex

Поступила в редакцию:	28 сент. 2018 г.
Принята к публикации:	15 нояб. 2018 г.
Опубликована online:	16 нояб. 2018 г.
Опубликована в печати:	1 февр. 2019 г.

Web of science:	WOS:000455224100033
Scopus:	2-s2.0-85056869050
РИНЦ:	38633202 \| 41780668 \| 41610841
Chemical Abstracts:	2018:2296644
OpenAlex:	W2901450093

БД	Цитирований
Scopus	22
Web of science	22
РИНЦ	19
OpenAlex	21