Iron(III) chloride/R-Cl/tributylphosphine for metal-catalyzed living radical polymerization: A unique system with a higher oxidation state iron complex

Authors

  • Kotaro Satoh,

    1. Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Furo-Cho, Chikusa-Ku, Nagoya 464-8603, Japan
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  • Hiroshi Aoshima,

    1. Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Furo-Cho, Chikusa-Ku, Nagoya 464-8603, Japan
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  • Masami Kamigaito

    Corresponding author
    1. Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Furo-Cho, Chikusa-Ku, Nagoya 464-8603, Japan
    • Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Furo-Cho, Chikusa-Ku, Nagoya 464-8603, Japan
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Abstract

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Iron(III) chloride (FeCl3), a higher oxidation state iron species, was employed for the metal-catalyzed living radical polymerization of styrene in the presence of tributylphosphine and a chloride initiator without any added reducing agents or radical initiators. The polymerization smoothly proceeded in toluene at 100 °C to produce polymers with controlled molecular weights and narrow molecular weight distributions (MWDs) (Mw/Mn = 1.1–1.2). The copolymerization of styrene and methyl methacrylate resulted in the simultaneous consumption of both monomers to give copolymers with controlled molecular weights and narrow MWDs, indicating that the FeCl3-catalyzed polymerization proceeded via a radical mechanism.

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