Phosphanyl Methanimine (PCN) Ligands for the Selective Trimerization/Tetramerization of Ethylene with Chromium

Radcliffe, James E.; Batsanov, Andrei S.; Smith, David M.; Scott, John A.; Dyer, Philip W.; Hanton, Martin J.

Abstract

1-Phosphanyl methanimine ligands, R2P–C(Ph)═NR′, may be prepared via a modular, convergent synthesis in good overall yield. Coordination chemistry studies with chromium confirm that they bind in a bidentate κ2-P,N mode. In combination with chromium and an activator, these ligands promote the selective oligomerization of ethylene to 1-hexene and 1-octene with high activity. Notably, an exceptionally high liquid fraction selectivity to saleable products (1-hexene + 1-octene) is observed (>95%), along with a potent ligand dependence, such that selectivity can be varied from pure trimerization through to mixed trimerisation/tetramerisation with a 1-octene:1-hexene (OTH) ratio of 1.7.

Citation

Radcliffe, J. E., Batsanov, A. S., Smith, D. M., Scott, J. A., Dyer, P. W., & Hanton, M. J. (2015). Phosphanyl Methanimine (PCN) Ligands for the Selective Trimerization/Tetramerization of Ethylene with Chromium. ACS Catalysis, 5(12), 7095-7098. https://doi.org/10.1021/acscatal.5b02106

• Journal Article Type: Article
• Acceptance Date: Oct 30, 2015
• Online Publication Date: Nov 2, 2015
• Publication Date: Dec 4, 2015
• Deposit Date: Nov 2, 2015
• Publicly Available Date: Oct 30, 2016
• Journal: ACS Catalysis
• Electronic ISSN: 2155-5435
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 5
• Issue: 12
• Pages: 7095-7098
• DOI: https://doi.org/10.1021/acscatal.5b02106
• Keywords: Oligomerization, Trimerization, Tetramerization, Ethylene, Catalysis, α-olefins, Chromium, P,N-ligands.
• Public URL: https://durham-repository.worktribe.com/output/1418862