Journal of the American Chemical Society
Journal of the American Chemical Society
5 years ago

Pentafluorosulfanyl Substituents in Polymerization Catalysis

Pentafluorosulfanyl Substituents in Polymerization Catalysis
Philip Kenyon, Stefan Mecking
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.

Publisher URL: http://dx.doi.org/10.1021/jacs.7b06745

DOI: 10.1021/jacs.7b06745

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