The Nature of Nickel Species Formed upon the Activation of α-Diimine Nickel(II) pre-Catalyst with Alkylaluminum Sesquichlorides
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Journal of Organometallic Chemistry
ISSN: 0022-328X
|
| Output data |
Year: 2020,
Volume: 907,
Article number
: 121063,
Pages count
: 6
DOI:
10.1016/j.jorganchem.2019.121063
|
| Tags |
EPR; Ethylene intermediates; Nickel; NMR; Polymerization |
| Authors |
Soshnikov Igor E.
1,2
,
Semikolenova Nina V.
1
,
Bryliakov Konstantin P.
1,2
,
Antonov Artem A.
1,2
,
Sun Wen-Hua
3
,
Talsi Evgenii P.
1,2
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis, Pr. Lavrentieva, 5, Novosibirsk, 630090, Russian Federation
|
| 2 |
Novosibirsk State University, Pirogova 1, Novosibirsk, 630090, Russian Federation
|
| 3 |
State Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
|
|
Funding (3)
|
1
|
Federal Agency for Scientific Organizations
|
0303-2016-0009
|
|
2
|
Russian Foundation for Basic Research
|
18-53-80031
|
|
3
|
National Natural Science Foundation of China
|
51861145303
|
The nature of nickel(II) species, formed upon the activation of α-diiminonickel pre-catalyst LNNiIIBr2 (LN = 1,2-Bis[(2,4,6-trimethylphenyl)imino]acenaphthene) with Al2Et3Cl3 and Al2Me3Cl3, has been studied using 1H and 2H NMR spectroscopy. The paramagnetic heterobinuclear ion pairs of the type [LNNiII(μ-Cl)2AlRCl]+[A]– (where R = Et or Me, [A]- = counter anion) have been observed in the catalyst systems LNNiIIBr2/Al2Et3Cl3 and LNNiIIBr2/Al2Me3Cl3. At room temperature, both ion pairs gradually transform into EPR-active complexes of Ni(I). Their possible role in ethylene polymerization is discussed. © 2019 Elsevier B.V.