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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

Реферат: 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.
Библиографическая ссылка: 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
Даты:
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.
Идентификаторы БД:
Web of science: WOS:000455224100033
Scopus: 2-s2.0-85056869050
РИНЦ: 38633202 | 41780668 | 41610841
Chemical Abstracts: 2018:2296644
OpenAlex: W2901450093
Цитирование в БД:
БД Цитирований
Scopus 23
Web of science 23
РИНЦ 22
OpenAlex 24
Альметрики: