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Pentafluorophenyl Groups as Remote Substituents in Ni(II) Polymerization Catalysis

Pentafluorophenyl Groups as Remote Substituents in Ni(II) Polymerization Catalysis

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SCHNITTE, Manuel, Sophia LIPINSKI, Eva SCHIEBEL, Stefan MECKING, 2020. Pentafluorophenyl Groups as Remote Substituents in Ni(II) Polymerization Catalysis. In: Organometallics. American Chemical Society (ACS). 39(1), pp. 13-17. ISSN 0276-7333. eISSN 1520-6041. Available under: doi: 10.1021/acs.organomet.9b00784

@article{Schnitte2020Penta-48256, title={Pentafluorophenyl Groups as Remote Substituents in Ni(II) Polymerization Catalysis}, year={2020}, doi={10.1021/acs.organomet.9b00784}, number={1}, volume={39}, issn={0276-7333}, journal={Organometallics}, pages={13--17}, author={Schnitte, Manuel and Lipinski, Sophia and Schiebel, Eva and Mecking, Stefan} }

Pentafluorophenyl Groups as Remote Substituents in Ni(II) Polymerization Catalysis Mecking, Stefan 2020-01-17T12:57:33Z 2020-01-17T12:57:33Z Schnitte, Manuel Lipinski, Sophia Schiebel, Eva eng Perfluoroaromatic molecules have been studied intensively as versatile electron-poor π systems. We demonstrate the use of pentafluorophenyl substituents in remote positions of Ni(II) salicylaldiminato catalysts for ethylene polymerization. With their strongly electron-withdrawing character, high molecular weights of M<sub>n</sub> > 10<sup>5</sup> g/mol and simultaneously low degrees of branching are accessible due to an efficient suppression of β-hydride elimination. This can be ascribed to suppressed nickel–aryl interactions and reduced electron densities at the metal center, as concluded from X-ray crystal structure analysis and electrochemical studies. The pentafluorophenyl-substituted catalyst is stable under aqueous conditions for direct polymerization to dispersions of well-defined nanocrystals. Lipinski, Sophia 2020 Schnitte, Manuel Schiebel, Eva Mecking, Stefan

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