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Nitrogen-Linked Diphosphine Ligands with Ethers Attached to Nitrogen for Chromium-Catalyzed Ethylene Tri- and Tetramerizations

Elowe, Paul R. and McCann, Cassandra and McCann, Paul G. and Spitzmesser, Stefan K. and Bercaw, John E. (2006) Nitrogen-Linked Diphosphine Ligands with Ethers Attached to Nitrogen for Chromium-Catalyzed Ethylene Tri- and Tetramerizations. Organometallics, 25 (22). pp. 5255-5260. ISSN 0276-7333. https://resolver.caltech.edu/CaltechAUTHORS:20170309-075631633

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Abstract

A series of bis(diphenylphosphino)amine ligands with a donor group attached to the nitrogen linker have been prepared. Metalation of these ligands with chromium trichloride provides precursors to highly active, relatively stable, and selective catalysts for trimerization and tetramerization of ethylene. It has been demonstrated in oligomerization reactions performed at 1 and 4 atm of ethylene that these new systems increase total productivity by enhancing catalyst stability, as compared with those lacking a donor group on the diphosphine ligand. Furthermore, the use of chlorobenzene solvent (rather than toluene) significantly improves productivity, stability, and selectitvity. The product distributions and minor byproducts provide information relevant to mechanistic issues surrounding these types of reactions.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/om0601596DOIArticle
http://pubs.acs.org/doi/abs/10.1021/om0601596PublisherArticle
http://pubs.acs.org/doi/suppl/10.1021/om0601596PublisherSupporting Information
Additional Information:© 2006 American Chemical Society. Received 18 February 2006. Published online 30 September 2006. Published in print 1 October 2006. We thank Dr. Steven A. Cohen (Innovene, now Ineos) for helpful discussions and Michael W. Day and Lawrence M. Henling (Caltech) for assistance with single-crystal X-ray crystallographic studies. We are grateful to BP Chemicals and Innovene for financial support.
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Funding AgencyGrant Number
BP ChemicalsUNSPECIFIED
InnoveneUNSPECIFIED
Issue or Number:22
Record Number:CaltechAUTHORS:20170309-075631633
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170309-075631633
Official Citation:Nitrogen-Linked Diphosphine Ligands with Ethers Attached to Nitrogen for Chromium-Catalyzed Ethylene Tri- and Tetramerizations Paul R. Elowe, Cassandra McCann, Paul G. Pringle, Stefan K. Spitzmesser, and John E. Bercaw Organometallics 2006 25 (22), 5255-5260 DOI: 10.1021/om0601596
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:74953
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:09 Mar 2017 16:39
Last Modified:03 Oct 2019 16:44

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