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

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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 Mn > 105 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.

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ISO 690SCHNITTE, Manuel, Sophia LIPINSKI, Eva SCHIEBEL, Stefan MECKING, 2020. Pentafluorophenyl Groups as Remote Substituents in Ni(II) Polymerization Catalysis. In: Organometallics. American Chemical Society (ACS). 2020, 39(1), pp. 13-17. ISSN 0276-7333. eISSN 1520-6041. Available under: doi: 10.1021/acs.organomet.9b00784
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@article{Schnitte2020Penta-48256,
  year={2020},
  doi={10.1021/acs.organomet.9b00784},
  title={Pentafluorophenyl Groups as Remote Substituents in Ni(II) Polymerization Catalysis},
  number={1},
  volume={39},
  issn={0276-7333},
  journal={Organometallics},
  pages={13--17},
  author={Schnitte, Manuel and Lipinski, Sophia and Schiebel, Eva and Mecking, Stefan}
}
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