Journal
CATALYSIS TODAY
Volume 93-5, Issue -, Pages 281-285Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cattod.2004.06.057
Keywords
late transition metal chemistry; iron and cobalt; pyridyl bis-imine ligands; ethylene polymerization
Ask authors/readers for more resources
Polymerizations and oligomerizations of ethylene by using a series of bis(imino)pyridyl Co(II) and Fe(II) complexes {[(2-ArN=C (Me))(2)C5H3N]MCl2} (Ar = 2,6-C6H3Me2, 1; 2,5-C6H3Me2, 2; 2,4-C6H3Me2, 3; 2,3-C6H3Me2, 4; M=Co, a; Fe, b) bearing two methyl substituents on each imine aryl group are reported. These complexes, when activated with methylaluminoxane in aromatic or aliphatic hydrocarbon solvents, oligomerize or polymerize ethylene to alpha-olefins or high polymers with exceptionally high activities and selectivities. The activities and selectivities to alpha-olefins or high polymers are dependent on the catalyst structure and the type of metal. The steric bulk around the metal center is key to retarding chain transfer to obtain high molecular weight polyethylene. (C) 2004 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available