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Pentafluorosulfanyl Substituents in Polymerization Catalysis

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2017

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https://doi.org/10.1021/jacs.7b06745
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Journal of the American Chemical Society : JACS. 2017, 139(39), pp. 13786-13790. ISSN 0002-7863. eISSN 1520-5126. Available under: doi: 10.1021/jacs.7b06745

Zusammenfassung

Highly electron-withdrawing pentafluorosulfanyl groups were probed as substituents in an organometallic catalyst. In Ni(II) salicylaldiminato complexes as an example case, these highly electron-withdrawing substituents allow for polymerization of ethylene to higher molecular weights with reduced branching due to significant reductions in β-hydrogen elimination. Combined with the excellent functional group tolerance of neutral Ni(II) complexes, this suppression of β-hydrogen elimination allows for the direct polymerization of ethylene in water to nanocrystal dispersions of disentangled, ultrahigh-molecular-weight linear polyethylene.

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ISO 690KENYON, Philip, Stefan MECKING, 2017. Pentafluorosulfanyl Substituents in Polymerization Catalysis. In: Journal of the American Chemical Society : JACS. 2017, 139(39), pp. 13786-13790. ISSN 0002-7863. eISSN 1520-5126. Available under: doi: 10.1021/jacs.7b06745
BibTex
@article{Kenyon2017-10-04Penta-40509,
  year={2017},
  doi={10.1021/jacs.7b06745},
  title={Pentafluorosulfanyl Substituents in Polymerization Catalysis},
  number={39},
  volume={139},
  issn={0002-7863},
  journal={Journal of the American Chemical Society : JACS},
  pages={13786--13790},
  author={Kenyon, Philip and Mecking, Stefan}
}
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    <dcterms:abstract xml:lang="eng">Highly electron-withdrawing pentafluorosulfanyl groups were probed as substituents in an organometallic catalyst. In Ni(II) salicylaldiminato complexes as an example case, these highly electron-withdrawing substituents allow for polymerization of ethylene to higher molecular weights with reduced branching due to significant reductions in β-hydrogen elimination. Combined with the excellent functional group tolerance of neutral Ni(II) complexes, this suppression of β-hydrogen elimination allows for the direct polymerization of ethylene in water to nanocrystal dispersions of disentangled, ultrahigh-molecular-weight linear polyethylene.</dcterms:abstract>
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