TY - JOUR

T1 - Influence of a diimine ligand and an activator on the processes taking place in Brookhart-type nickel catalytic systems

AU - Gurinovich, Natalya S.

AU - Petrovsky, Stanislav K.

AU - Saliy, Ivan V.

AU - Saraev, Vitaliy V.

PY - 2018/3/1

Y1 - 2018/3/1

N2 - Brookhart-type catalytic systems based on zero-valent nickel complexes Ni(COD)2 and Ni(COD)L [where COD is cyclooctadiene and L is bis-2,6-diisopropylphenyl-diazabutadiene (DPP-DAB) or N,N′-bis-2,6- diisopropylphenyl-bis-iminoacenaphthene (DPP-BIAN)] activated with Lewis acids such as methylaluminoxane (MAO) and boron trifluoride etherate BF3·OEt2 were investigated via electron spin resonance (ESR) spectrometry, revealing that presence of diimine ligand results in Lewis acids, formally oxidating Ni(0) to Ni(I). An oxidation mechanism is proposed.

AB - Brookhart-type catalytic systems based on zero-valent nickel complexes Ni(COD)2 and Ni(COD)L [where COD is cyclooctadiene and L is bis-2,6-diisopropylphenyl-diazabutadiene (DPP-DAB) or N,N′-bis-2,6- diisopropylphenyl-bis-iminoacenaphthene (DPP-BIAN)] activated with Lewis acids such as methylaluminoxane (MAO) and boron trifluoride etherate BF3·OEt2 were investigated via electron spin resonance (ESR) spectrometry, revealing that presence of diimine ligand results in Lewis acids, formally oxidating Ni(0) to Ni(I). An oxidation mechanism is proposed.

KW - Brookhart-type catalysts

KW - Diimine ligands

KW - ESR spectroscopy

KW - Lewis acids

KW - Ni(0) complexes

KW - Ni(I) complexes

UR - http://www.scopus.com/inward/record.url?scp=85034858865&partnerID=8YFLogxK

U2 - 10.1007/s11164-017-3207-x

DO - 10.1007/s11164-017-3207-x

M3 - Article

AN - SCOPUS:85034858865

VL - 44

SP - 1935

EP - 1944

JO - Research on Chemical Intermediates

JF - Research on Chemical Intermediates

SN - 0922-6168

IS - 3

ER -