TY - JOUR

T1 - Vanadium(III)-Catalyzed Polymerization of α-Olefins

T2 - Detailed NMR Spectroscopic Characterization of Intermediates Modeling the Active Species of Polymerization

AU - Soshnikov, Igor E.

AU - Semikolenova, Nina V.

AU - Bryliakov, Konstantin P.

AU - Zakharov, Vladimir A.

AU - Talsi, Evgenii P.

PY - 2017/4/7

Y1 - 2017/4/7

N2 - 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.

AB - 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.

KW - N ligands

KW - NMR spectroscopy

KW - polymerization

KW - reaction mechanism

KW - vanadium

KW - ACTIVATION

KW - EPR

KW - VANADIUM COMPLEXES

KW - IRON(II)

KW - ETHYLENE POLYMERIZATION

KW - H-1

KW - LIGANDS

KW - ZIEGLER-NATTA

KW - CATALYTIC BEHAVIOR

UR - http://www.scopus.com/inward/record.url?scp=85013657157&partnerID=8YFLogxK

U2 - 10.1002/cctc.201601634

DO - 10.1002/cctc.201601634

M3 - Article

AN - SCOPUS:85013657157

VL - 9

SP - 1253

EP - 1260

JO - ChemCatChem

JF - ChemCatChem

SN - 1867-3880

IS - 7

ER -