Oligomerization of α-olefins by the dimeric nickel bisamido complex [Ni{1-N(PMes2)-2-N(μ-PMes2)C6H43N,N′,P,-κ1P′}]2 activated by methylalumoxane (MAO)

Felicite Majoumo-Mbe, Peter Lönnecke, Victoria Volkis, Manab Sharma, Moris S. Eisen*, Evamarie Hey-Hawkins

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The reaction of Li2[1,2-{N(PMes2)}2C6H4], formed in situ from n-BuLi and the corresponding amines, with 1 equiv. of [NiBr2(DME)] gives [Ni{1-N(PMes2)-2-N(μ-PMes2)C6H43N,N′,P-κ1P′}]2 (1). After activation by methylalumoxane (MAO), 1 is a highly active catalyst in the oligomerization and isomerization of α-olefins such as ethene, propene, isobutene, 1-hexene and 1,5-hexadiene. For ethene oligomerization turnover frequencies (TOFs) range from 3000 to 79015 h-1, depending on the reaction conditions. The TOF for propene oligomerization reaches 1 190 730 h-1. To our knowledge, catalyst 1, activated by MAO, is the most active catalyst for the oligomerization of propene and outperforms the best known complexes for this reaction. In the reactions with 1-hexene, 1,5-hexadiene and isobutene dimerization and isomerization products were observed.

Original languageEnglish
Pages (from-to)2603-2609
Number of pages7
JournalJournal of Organometallic Chemistry
Volume693
Issue number15
DOIs
StatePublished - 15 Jul 2008
Externally publishedYes

Keywords

  • α-Olefins
  • Nickel complex
  • Oligomerization reaction
  • P,N ligand

Fingerprint Dive into the research topics of 'Oligomerization of α-olefins by the dimeric nickel bisamido complex [Ni{1-N(PMes<sub>2</sub>)-2-N(μ-PMes<sub>2</sub>)C<sub>6</sub>H<sub>4</sub>-κ<sup>3</sup>N,N′,P,-κ<sup>1</sup>P′}]<sub>2</sub> activated by methylalumoxane (MAO)'. Together they form a unique fingerprint.

Cite this