Experimental evidence for large ring metallacycle intermediates in polyethylene chain growth using homogeneous chromium catalysts

Atanas K Tomov; Juan J Chirinos; David J Jones; Richard J Long; Vernon C Gibson

doi:10.1021/ja051523f

Experimental evidence for large ring metallacycle intermediates in polyethylene chain growth using homogeneous chromium catalysts

J Am Chem Soc. 2005 Jul 27;127(29):10166-7. doi: 10.1021/ja051523f.

Authors

Atanas K Tomov¹, Juan J Chirinos, David J Jones, Richard J Long, Vernon C Gibson

Affiliation

¹ Imperial College London, South Kensington Campus, London SW7 2AY, UK.

PMID: 16028917
DOI: 10.1021/ja051523f

Abstract

Deuterio-ethylene labeling studies on two homogeneous chromium ethylene oligomerization catalysts show that chain propagation proceeds via metallacyclic intermediates; reactions performed in the presence of 1-nonene show no incorporation of the higher olefin, strongly implicating the involvement of large ring metallacycles.