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http://dx.doi.org/10.5012/bkcs.2006.27.7.1031

Novel Nickel Catalysts Containing Tetradentate Chelating Ligands for the Polymerization of Norbornene  

Lee, Dong Hwan (Department of Chemistry, Inha University)
Lee, Jun Yong (Department of Fine Chemistry, Seoul National University of Technology)
Ryu, Ji Young (Department of Fine Chemistry, Seoul National University of Technology)
Kim, Youngmee (Division of Nano Sciences, Ewha Womans University)
Kim, Cheal (Department of Fine Chemistry, Seoul National University of Technology)
Lee, Ik-Mo (Department of Chemistry, Inha University)
Publication Information
Bulletin of the Korean Chemical Society / v.27, no.7, 2006 , pp. 1031-1037 More about this Journal
Abstract
New nickel complexes containing novel tetradentate ligands, 4,5-substituted-1,2-bis(pyridine-2-carboxamide)-benzene ligands but lacking alkyl or halide ligands in the coordination sphere have been prepared. They were activated with MMAO (modified methylaluminoxane) to be proven as efficient catalysts for the polymerization of norbornene. Both electron-donating and -withdrawing substituents on the benzene ring and polar solvents enhance the catalytic activity for olefin polymerization. Improvement in thermal stability of the complexes was observed. Some of these complexes were crystallographically determined to have square planar geometry. A plausible mechanism involving dissociation of ligands is proposed.
Keywords
Nickel complexes; Tetradentate ligands; 4,5-Substituted-1,2-bis(pyridine-2-carboxamide)-benzene; MMAO; Norbornene polymerization;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By Web Of Science : 15  (Related Records In Web of Science)
Times Cited By SCOPUS : 0
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