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Novel nickel catalysts containing tetradentate chelating ligands for the polymerization of norbornene

Title
Novel nickel catalysts containing tetradentate chelating ligands for the polymerization of norbornene
Authors
Lee, Dong HwanLee, Jun YongRyu, Ji YoungKim, YoungmeeKim, ChealLee, Ik-Mo
Ewha Authors
김영미
SCOPUS Author ID
김영미scopus
Issue Date
2006
Journal Title
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
ISSN
0253-2964JCR Link
Citation
vol. 27, no. 7, pp. 1031 - 1037
Keywords
nickel complexestetradentate ligands4,5-substituted-1,2-bis(pyridine-2-carboxamide)-benzeneMMAOnorbornene polymerization
Publisher
KOREAN CHEMICAL SOC
Indexed
SCI; SCIE; SCOPUS; KCI WOS scopus
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.
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자연과학대학 > 화학·나노과학전공 > Journal papers
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