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An Alternative Mechanistic Concept for Homogeneous Selective Ethylene Oligomerization of Chromium‐Based Catalysts: Binuclear Metallacycles as a Reason for 1‐Octene Selectivity?
Author(s) -
Peitz Stephan,
Aluri Bhaskar R.,
Peulecke Normen,
Müller Bernd H.,
Wöhl Anina,
Müller Wolfgang,
AlHazmi Mohammed H.,
Mosa Fuad M.,
Rosenthal Uwe
Publication year - 2010
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201000750
Subject(s) - ethylene , 1 octene , catalysis , selectivity , amine gas treating , chromium , chemistry , homogeneous , ligand (biochemistry) , combinatorial chemistry , octene , metal , organic chemistry , biochemistry , physics , thermodynamics , receptor
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.