Selective Ethylene Trimerization by Titanium Complexes Bearing Phenoxy-Imine Ligands with Pendant Arm: NMR- and EPR-Spectroscopic Study of the Reaction Intermediates
Conference Abstracts
| Общее |
Language:
Английский,
Genre:
Conference Abstracts,
Status:
Published,
Source type:
Original
|
| Conference |
EuropaCat-XII: 12th European Congress on Catalysis “Catalysis: Balancing the use of fossil and renewable resources”
30 Aug - 4 Sep 2015
,
Казань
|
| Source |
EuropaCat XII. Catalysis: Balancing the use of fossil and renewable resources. XII European Congress on Catalysis, Kazan (Russia), 30 August - 4 September, 2015 : Book of Abstracts
Compilation,
Boreskov Institute of Catalysis. Novosibirsk.2015.
2184 c. ISBN 9785906376107.
publication_identifier_short.rinz_identifier_type
|
| Output data |
Year: 2015,
Pages: 339-340
Pages count
: 2
|
| Authors |
Soshnikov I.E.
1,2
,
Semikolenova N.V.
1
,
Bryliakov K.P.
1,2
,
Zakharov V.A.
1,2
,
Talzi E.P.
1,2
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia
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| 2 |
Novosibirsk State University, Novosibirsk, Russia
|
|
Funding (1)
|
1
|
Russian Foundation for Basic Research
|
14-03-31155
|
The catalyst systems, for selective trimerization of ethylene are of great industrial and academic interest, since 1-hexene is used as a comonomer for linear-low-density polyethylene production. The titanium(IV) complex LTiCl3 bearing a substituted phenoxy-imine ligand L activated with MAO produced 1-hexene with high activity and selectivity. The presented work is aimed at NMR and EPR spectroscopic study of the Ti(IV), Ti(III) and Ti(II) species formed upon activation of the pre-catalyst LTiIVCl3 with various activators (MAO, MMAO, AlR3/[CPh3]+[B(C6F5)4]-,
R = Me, Et, iBu) to elucidate possible role of the observed titanium species in ethylene trimerization and polymerization reactions. It was found that Ti(IV) complexes [LTiIVMe2]+[A], and Ti(II) complexes of the type [LTiII(S)]+[A]- ([A]- = counter ion, S = solvent or vacancy) participate in the selective ethylene trimerization process, whereas Ti(III) species of the type [LTiIII(μ-H)(μ-Cl)AliBu2]+[MeMMAO] and [LTiIII(μ-Me)(μ-Cl)AliBu2]+[MeMMAO]- can
promote undesirable PE formation.