title: An alternative mechanistic concept for homogeneous selective ethylene oligomerization of chromium-based catalysts: binuclear metallacycles as a reason for 1-octene selectivity?
abstract: An alternative concept for the selective catalytic formation of 1-octene from ethylene via dimeric catalytic centers is proposed. The selectivity of the tetramerization systems depends on the capability of ligands to form binuclear complexes that subsequently build up and couple two separate metallacyclopentanes to form 1-octene selectively. Comparison of existing catalytic processes, the ability of the bis(diarylphosphino)amine (PNP) ligand to bridge two metal centers, and the experimental background support the proposed binuclear mechanism for ethylene tetramerization.
authors.affiliation: Leibniz-Institut für Katalyse an der Universität Rostock e.V., Albert-Einstein-Str. 29A, 18059 Rostock, Germany.
authors.forename: Stephan
authors.initials: S
authors.lastname: Peitz
authors.forename: Bhaskar R
authors.initials: BR
authors.lastname: Aluri
authors.forename: Normen
authors.initials: N
authors.lastname: Peulecke
authors.forename: Bernd H
authors.initials: BH
authors.lastname: Müller
authors.forename: Anina
authors.initials: A
authors.lastname: Wöhl
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Müller
authors.forename: Mohammed H
authors.initials: MH
authors.lastname: Al-Hazmi
authors.forename: Fuad M
authors.initials: FM
authors.lastname: Mosa
authors.forename: Uwe
authors.initials: U
authors.lastname: Rosenthal