Vanadium(III)-Catalyzed Polymerization of α-Olefins: Detailed NMR Spectroscopic Characterization of Intermediates Modeling the Active Species of Polymerization
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
ChemCatChem
ISSN: 1867-3880
, E-ISSN: 1867-3899
|
| Output data |
Year: 2017,
Volume: 9,
Number: 7,
Pages: 1253-1260
Pages count
: 8
DOI:
10.1002/cctc.201601634
|
| Tags |
N ligands, NMR spectroscopy, polymerization, reaction mechanism, vanadium |
| Authors |
Soshnikov Igor E.
1,2
,
Semikolenova Nina V.
1
,
Bryliakov Konstantin P.
1,2
,
Zakharov Vladimir A.
1,2
,
Talsi Evgenii P.
1,2
|
| Affiliations |
| 1 |
Federal Agency for Scientific Organizations, Siberian Branch of the Russian Academy of Sciences,
Boreskov Institute of Catalysis, 630090, Novosibirsk, pr. Akad. Lavrent’eva, 5 (Russian Federation)
|
| 2 |
The Ministry of Education and Science of the Russian Federation, Novosibirsk State University, 630090, Novosibirsk, Pirogova street, 2
(Russian Federation)
|
|
Funding (4)
|
1
|
The Ministry of Education and Science of the Russian Federation
|
|
|
2
|
Russian Foundation for Basic Research
|
16-53-53014
|
|
3
|
Russian Foundation for Basic Research
|
16-03-00236
|
|
4
|
Federal Agency for Scientific Organizations
|
0303-2016-0009
|
The ion pairs formed upon the activation of bis(imino)pyridine complex LVCl3 (L=2,6-bis[1-(2,6-dimethylphenylimino)ethyl]pyridine) with AlMe2Cl and AlMe3/[Ph3C][B(C6F5)4] were characterized in detail by 1H and 2H NMR spectroscopy, including the first NMR observation of the VIII−CH3 group. The following ion pairs were identified: [L(Cl)VIII(μ-Cl)2AlMe2]+[A]−, [L(Me)VIII(μ-Cl)2AlMe2]+[A]−, [LVIIICl2(THF)]+[A]−, and [LVIII(Cl)Me(THF)]+[A]− ([A]−=[AlMe3Cl]− or [B(C6F5)4]−, THF=tetrahydrofuran). The nature of the ethylene polymerization active species is discussed.