NMR Spectroscopic Identification of Ni(II) Species Formed upon Activation of (α-diimine)NiBr2 Polymerization Catalysts with MAO and MMAO | Sciact - CRIS-система Института катализа

NMR Spectroscopic Identification of Ni(II) Species Formed upon Activation of (α-diimine)NiBr2 Polymerization Catalysts with MAO and MMAO Научная публикация

Журнал

Dalton Transactions
ISSN: 1477-9226 , E-ISSN: 1477-9234

Вых. Данные

Год: 2018, Том: 47, Номер: 14, Страницы: 4968-4974 Страниц : 7 DOI: 10.1039/c8dt00483h

Ключевые слова

Catalysts; Chemical activation; Electron spin resonance spectroscopy; Ions; Nuclear magnetic resonance spectroscopy; Polymerization

Авторы

Soshnikov Igor E. ^1,2 , Semikolenova Nina V. ¹ , Bryliakov Konstantin P. ^1,2 , Antonov Artem A. ^1,2 , Zakharov Vladimir A. ^1,2 , Talsi Evgenii P. ^1,2

Организации

1	Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation
2	Novosibirsk State University, Novosibirsk, Russian Federation

Информация о финансировании (2)

1	Российский фонд фундаментальных исследований	16-03-00236
2	Федеральное агентство научных организаций России	0303-2016-0009

The nature of Ni(II) species formed upon the activation of the Brookhart's α-diimine polymerization pre-catalyst LNiBr2 with MAO and MMAO (L = 1,4-bis-2,4,6-dimethylphenyl-2,3-dimethyl-1,4-diazabuta-1,3-diene) has been established using 1H and 13C NMR spectroscopy. The heterobinuclear ion pair [LNiII(μ-Me)2AlMe2]+[MeMAO]− is observed at the initial stage of the reaction of LNiBr2 with MAO at −40 °C, whereas the ion pair [LNiII–tBu]+[MeMMAO]− predominates at the initial stage of the reaction of LNiBr2 with MMAO under the same conditions. At higher temperatures, both ion pairs transform into a Ni(I) species displaying an axially anisotropic EPR spectrum (g‖ = 2.21, g⊥ = 2.06, A⊥ = 1.06 mT).

Soshnikov I.E. , Semikolenova N.V. , Bryliakov K.P. , Antonov A.A. , Zakharov V.A. , Talsi E.P.
NMR Spectroscopic Identification of Ni(II) Species Formed upon Activation of (α-diimine)NiBr2 Polymerization Catalysts with MAO and MMAO
Dalton Transactions. 2018. V.47. N14. P.4968-4974. DOI: 10.1039/c8dt00483h WOS Scopus РИНЦ CAPlusCA PMID OpenAlex

Поступила в редакцию:	5 февр. 2018 г.
Принята к публикации:	6 мар. 2018 г.
Опубликована online:	7 мар. 2018 г.
Опубликована в печати:	14 апр. 2018 г.

Web of science:	WOS:000429743700025
Scopus:	2-s2.0-85044922614
РИНЦ:	35531793
Chemical Abstracts:	2018:398396
Chemical Abstracts (print):	170:412868
PMID (PubMed):	29557471
OpenAlex:	W2792373266

БД	Цитирований
Web of science	17
Scopus	18
РИНЦ	17
OpenAlex	18