Nickel-based ethylene oligomerization catalysts supported by PNSiP ligands

Yongwang Huang; Le Zhang; Wei Wei; Fakhre Alam; Tao Jiang

doi:10.1080/10426507.2018.1424157

Nickel-based ethylene oligomerization catalysts supported by PNSiP ligands

Yongwang Huang, Le Zhang, Wei Wei, Fakhre Alam, Tao Jiang^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

A series of nickel (II) complexes bearing silicon bridged diphosphines ligands (PNSiP) have been synthesized and characterized. All nickel precatalysts, activated with ethylaluminum dichloride (EtAlCl₂), exhibited moderate to high activities for ethylene dimerization to butylene. The in situ nickel precatalysts formed by mixing N-cyclopentyl-N-((diphenylphosphanyl)dimethylsilyl)-1,1-diphenylphosphanamine (L2) with NiBr₂(DME) showed high catalytic activity (2.40 × 10⁸ g/(mol_Ni·h)) and high product selectivity (88.6%) towards butene using methylcyclohexane as solvent at 1.0 MPa ethylene pressure and 45°C temperature, no polyethylene(PE) was observed. Ligand backbone tuning of PNSiP-based catalytic systems help in precise understanding of steric bulk variation effects on catalytic performance.

Original language	English
Pages (from-to)	363-368
Number of pages	6
Journal	Phosphorus, Sulfur and Silicon and the Related Elements
Volume	193
Issue number	6
DOIs	https://doi.org/10.1080/10426507.2018.1424157
State	Published - 3 Jun 2018
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2018 Taylor & Francis Group, LLC.

Keywords

Butene
ethylaluminum dichloride
ethylene dimerization
nickel complexes

ASJC Scopus subject areas

Biochemistry
Organic Chemistry
Inorganic Chemistry

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10.1080/10426507.2018.1424157

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title = "Nickel-based ethylene oligomerization catalysts supported by PNSiP ligands",

abstract = "A series of nickel (II) complexes bearing silicon bridged diphosphines ligands (PNSiP) have been synthesized and characterized. All nickel precatalysts, activated with ethylaluminum dichloride (EtAlCl2), exhibited moderate to high activities for ethylene dimerization to butylene. The in situ nickel precatalysts formed by mixing N-cyclopentyl-N-((diphenylphosphanyl)dimethylsilyl)-1,1-diphenylphosphanamine (L2) with NiBr2(DME) showed high catalytic activity (2.40 × 108 g/(molNi·h)) and high product selectivity (88.6%) towards butene using methylcyclohexane as solvent at 1.0 MPa ethylene pressure and 45°C temperature, no polyethylene(PE) was observed. Ligand backbone tuning of PNSiP-based catalytic systems help in precise understanding of steric bulk variation effects on catalytic performance.",

keywords = "Butene, ethylaluminum dichloride, ethylene dimerization, nickel complexes",

author = "Yongwang Huang and Le Zhang and Wei Wei and Fakhre Alam and Tao Jiang",

note = "Publisher Copyright: {\textcopyright} 2018 Taylor & Francis Group, LLC.",

year = "2018",

month = jun,

day = "3",

doi = "10.1080/10426507.2018.1424157",

language = "English",

volume = "193",

pages = "363--368",

journal = "Phosphorus, Sulfur and Silicon and the Related Elements",

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TY - JOUR

T1 - Nickel-based ethylene oligomerization catalysts supported by PNSiP ligands

AU - Huang, Yongwang

AU - Zhang, Le

AU - Wei, Wei

AU - Alam, Fakhre

AU - Jiang, Tao

PY - 2018/6/3

Y1 - 2018/6/3

N2 - A series of nickel (II) complexes bearing silicon bridged diphosphines ligands (PNSiP) have been synthesized and characterized. All nickel precatalysts, activated with ethylaluminum dichloride (EtAlCl2), exhibited moderate to high activities for ethylene dimerization to butylene. The in situ nickel precatalysts formed by mixing N-cyclopentyl-N-((diphenylphosphanyl)dimethylsilyl)-1,1-diphenylphosphanamine (L2) with NiBr2(DME) showed high catalytic activity (2.40 × 108 g/(molNi·h)) and high product selectivity (88.6%) towards butene using methylcyclohexane as solvent at 1.0 MPa ethylene pressure and 45°C temperature, no polyethylene(PE) was observed. Ligand backbone tuning of PNSiP-based catalytic systems help in precise understanding of steric bulk variation effects on catalytic performance.

AB - A series of nickel (II) complexes bearing silicon bridged diphosphines ligands (PNSiP) have been synthesized and characterized. All nickel precatalysts, activated with ethylaluminum dichloride (EtAlCl2), exhibited moderate to high activities for ethylene dimerization to butylene. The in situ nickel precatalysts formed by mixing N-cyclopentyl-N-((diphenylphosphanyl)dimethylsilyl)-1,1-diphenylphosphanamine (L2) with NiBr2(DME) showed high catalytic activity (2.40 × 108 g/(molNi·h)) and high product selectivity (88.6%) towards butene using methylcyclohexane as solvent at 1.0 MPa ethylene pressure and 45°C temperature, no polyethylene(PE) was observed. Ligand backbone tuning of PNSiP-based catalytic systems help in precise understanding of steric bulk variation effects on catalytic performance.

KW - Butene

KW - ethylaluminum dichloride

KW - ethylene dimerization

KW - nickel complexes

UR - http://www.scopus.com/inward/record.url?scp=85041229973&partnerID=8YFLogxK

U2 - 10.1080/10426507.2018.1424157

DO - 10.1080/10426507.2018.1424157

M3 - Article

AN - SCOPUS:85041229973

SN - 1042-6507

VL - 193

SP - 363

EP - 368

JO - Phosphorus, Sulfur and Silicon and the Related Elements

JF - Phosphorus, Sulfur and Silicon and the Related Elements

IS - 6

ER -

Nickel-based ethylene oligomerization catalysts supported by PNSiP ligands

Abstract

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Keywords

ASJC Scopus subject areas

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