Результаты исследований: Научные публикации в периодических изданиях › обзорная статья › Рецензирование
Vanadium olefin polymerization catalysts : NMR spectroscopic characterization of V(III) intermediates. / Soshnikov, Igor E.; Semikolenova, Nina V.; Bryliakov, Konstantin P. и др.
в: Journal of Organometallic Chemistry, Том 867, 15.07.2018, стр. 4-13.Результаты исследований: Научные публикации в периодических изданиях › обзорная статья › Рецензирование
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TY - JOUR
T1 - Vanadium olefin polymerization catalysts
T2 - NMR spectroscopic characterization of V(III) intermediates
AU - Soshnikov, Igor E.
AU - Semikolenova, Nina V.
AU - Bryliakov, Konstantin P.
AU - Zakharov, Vladimir A.
AU - Talsi, Evgenii P.
PY - 2018/7/15
Y1 - 2018/7/15
N2 - Vanadium(III) species formed upon reacting α-diimine (1) and bis(imino)pyridine (5) vananadium(III) pre-catalysts with MAO, AlMe2Cl, AlMe2Cl/[Ph3C][B(C6F5)4], and AlMe3/[Ph3C][B(C6F5)4] have been characterized in detail by 1H, 2H, and 19F NMR spectroscopy; the VIII-CH3 moiety has been observed by 1H and 2H NMR spectroscopy. For complex 1, zwitterion-like species [L'VIIIR2 +···MeMAO-] and ion pairs [L'VIIIR2(THF)2]+[A]- (L' = 1,4-bis-3,5-dimethylphenyl-2,3-dimethyl-1,4-diazabuta-1,3-diene; [A]- = [MeMAO]- or [B(C6F5)4]-) have been identified. The outer-sphere ion pairs of the type [L(Cl)VIII(μ-Cl)2AlMe2]+[A]-, [L(Me)VIII(μ-Cl)2AlMe2]+[A]-, [LVIIICl2(THF)]+[A]- and [LVIII(Cl)Me(THF)]+[A]- (L = 2,6-bis[1-(2,6-dimethylphenylimino)ethyl]pyridine; [A]- = [AlMe3Cl]- or [B(C6F5)4]-) have been found in the systems based on the complex 5. The nature of the vanadium species active in ethylene polymerization and the catalyst deactivation pathways are discussed.
AB - Vanadium(III) species formed upon reacting α-diimine (1) and bis(imino)pyridine (5) vananadium(III) pre-catalysts with MAO, AlMe2Cl, AlMe2Cl/[Ph3C][B(C6F5)4], and AlMe3/[Ph3C][B(C6F5)4] have been characterized in detail by 1H, 2H, and 19F NMR spectroscopy; the VIII-CH3 moiety has been observed by 1H and 2H NMR spectroscopy. For complex 1, zwitterion-like species [L'VIIIR2 +···MeMAO-] and ion pairs [L'VIIIR2(THF)2]+[A]- (L' = 1,4-bis-3,5-dimethylphenyl-2,3-dimethyl-1,4-diazabuta-1,3-diene; [A]- = [MeMAO]- or [B(C6F5)4]-) have been identified. The outer-sphere ion pairs of the type [L(Cl)VIII(μ-Cl)2AlMe2]+[A]-, [L(Me)VIII(μ-Cl)2AlMe2]+[A]-, [LVIIICl2(THF)]+[A]- and [LVIII(Cl)Me(THF)]+[A]- (L = 2,6-bis[1-(2,6-dimethylphenylimino)ethyl]pyridine; [A]- = [AlMe3Cl]- or [B(C6F5)4]-) have been found in the systems based on the complex 5. The nature of the vanadium species active in ethylene polymerization and the catalyst deactivation pathways are discussed.
KW - Active species
KW - Bis(imino)pyridine
KW - Ethylene polymerization
KW - NMR
KW - Vanadium
KW - α-diimine
KW - bis(imino)pyridine
KW - ACTIVATION
KW - ALKYL
KW - bis(imino) pyridine
KW - EPR
KW - STATE
KW - IRON(II)
KW - ETHYLENE POLYMERIZATION
KW - H-1
KW - COMPLEXES SYNTHESIS
KW - LIGAND
KW - alpha-diimine
UR - http://www.scopus.com/inward/record.url?scp=85029667374&partnerID=8YFLogxK
U2 - 10.1016/j.jorganchem.2017.08.020
DO - 10.1016/j.jorganchem.2017.08.020
M3 - Review article
AN - SCOPUS:85029667374
VL - 867
SP - 4
EP - 13
JO - Journal of Organometallic Chemistry
JF - Journal of Organometallic Chemistry
SN - 0022-328X
ER -
ID: 10068816