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Bispentiptycenyl–Diimine–Nickel Complexes for Ethene Polymerization and Copolymerization with Polar Monomers

Kanai, Yuki and Foro, Sabine and Plenio, Herbert (2019):
Bispentiptycenyl–Diimine–Nickel Complexes for Ethene Polymerization and Copolymerization with Polar Monomers.
In: Organometallics, (2), 38. American Chemical Society, pp. 544-551, ISSN 0276-7333,
DOI: 10.1021/acs.organomet.8b00836,
[Online-Edition: https://pubs.acs.org/doi/10.1021/acs.organomet.8b00836],
[Article]

Abstract

Ni2+ coordinated within a bowl-shaped diimine ligand with two pentiptycenyl-substituents [(diimine)NiBr2] displays excellent activity for the polymerization of ethene (7 atm) with activities of up to 34 x 10(3) kg(mol Ni)(-1) h(-1) following activation with Et2AlCl. The resulting polymer is characterized by high molecular weights (M-n = 150 x 10(3) g.mol(-1)), low branching (12/1000 C), and a high melting point (Tm = 133 degrees C). The polymerization of ethene with polar comonomers leads to the formation of the respective polar polymers with very efficient incorporation of comonomer. The activity of the catalyst critically depends on the molar ratio of Et2AlCl activator and the polar functional group.

Item Type: Article
Erschienen: 2019
Creators: Kanai, Yuki and Foro, Sabine and Plenio, Herbert
Title: Bispentiptycenyl–Diimine–Nickel Complexes for Ethene Polymerization and Copolymerization with Polar Monomers
Language: English
Abstract:

Ni2+ coordinated within a bowl-shaped diimine ligand with two pentiptycenyl-substituents [(diimine)NiBr2] displays excellent activity for the polymerization of ethene (7 atm) with activities of up to 34 x 10(3) kg(mol Ni)(-1) h(-1) following activation with Et2AlCl. The resulting polymer is characterized by high molecular weights (M-n = 150 x 10(3) g.mol(-1)), low branching (12/1000 C), and a high melting point (Tm = 133 degrees C). The polymerization of ethene with polar comonomers leads to the formation of the respective polar polymers with very efficient incorporation of comonomer. The activity of the catalyst critically depends on the molar ratio of Et2AlCl activator and the polar functional group.

Journal or Publication Title: Organometallics
Journal volume: 38
Number: 2
Publisher: American Chemical Society
Uncontrolled Keywords: This work was supported by the TU Darmstadt and the DFG PI 178/13-2.
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Structure Research
07 Department of Chemistry
07 Department of Chemistry > Organ Chemistry
Date Deposited: 11 Sep 2020 06:55
DOI: 10.1021/acs.organomet.8b00836
Official URL: https://pubs.acs.org/doi/10.1021/acs.organomet.8b00836
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