An EPR Study of the V(IV) Species Formed Upon Activation of a Vanadyl Phenoxyimine Polymerization Catalyst with AlR3 and AlR2Cl (R ¼ Me, Et)a Full article
| Journal |
Macromolecular Chemistry and Physics
ISSN: 1022-1352 , E-ISSN: 1521-3935 |
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| Output data | Year: 2009, Volume: 210, Number: 7, Pages: 542-548 Pages count : 7 DOI: 10.1002/macp.200800556 | ||||||
| Tags | Active species, EPR, Olefin polymerization, Vanadium catalysts | ||||||
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| Affiliations |
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Funding (2)
| 1 | Russian Foundation for Basic Research | 06-03-32700 |
| 2 | Royal Society | 2006/R4-IJP |
Abstract:
Vanadium(IV) complexes formed in the systems L2VIVO/AlR3, L2VIVO/AlR3/ETA, L2VIVO/AlR2Cl, and L2VIVO/AlR2Cl/ETA, where L is a phenoxyimine ligand (Scheme 1), R = Me or Et, and ETA is ethyltrichloroacetate, were monitored by EPR. It was shown, that at 20 °C, V(IV) complexes with proposed structures (L′)VIV(O)(R)(AlR3) are formed in the systems L2VIVO/AlR3 and L2VIVO/AlR3/ETA, whereas complexes with proposed structures (L′)VIV(O)(R)(AlR2Cl) are formed in the systems L2VIVO/AlR2Cl and L2VIVO/AlR2Cl/ETA (L′ is the modified initial ligand). The systems L2VIVO/AlR3/ETA are inert towards polymerization of ethylene, whereas the systems L2VIVO/AlR2Cl/ETA are moderately active in this reaction. The polymerization activity of the systems L2VIVO/AlR2Cl/ETA correlates with the concentration of V(IV) species present in the reaction solution. V(IV) complexes of the type (L′)VIV(O)(R)(AlR2Cl) can be precursors of the active species of polymerization.
Cite:
Soshnikov I.E.
, Semikolenova N.V.
, Brylyakov K.P.
, Shubin A.A.
, Zakharov V.A.
, Redshaw C.
, Talsi E.P.
An EPR Study of the V(IV) Species Formed Upon Activation of a Vanadyl Phenoxyimine Polymerization Catalyst with AlR3 and AlR2Cl (R ¼ Me, Et)a
Macromolecular Chemistry and Physics. 2009. V.210. N7. P.542-548. DOI: 10.1002/macp.200800556 WOS Scopus РИНЦ ANCAN OpenAlex
An EPR Study of the V(IV) Species Formed Upon Activation of a Vanadyl Phenoxyimine Polymerization Catalyst with AlR3 and AlR2Cl (R ¼ Me, Et)a
Macromolecular Chemistry and Physics. 2009. V.210. N7. P.542-548. DOI: 10.1002/macp.200800556 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Nov 14, 2008 |
| Accepted: | Jan 22, 2009 |
| Published online: | Mar 4, 2009 |
| Published print: | Apr 2, 2009 |
Identifiers:
| Web of science: | WOS:000265322100004 |
| Scopus: | 2-s2.0-63849122504 |
| Elibrary: | 13613115 |
| Chemical Abstracts: | 2009:526766 |
| Chemical Abstracts (print): | 151:78477 |
| OpenAlex: | W2169648345 |