Alternating Copolymerization of Cyclohexene Oxide with Carbon Dioxide Catalyzed by (salalen)CrCl Complexes

DOI Web Site 被引用文献7件
  • Koji Nakano
    Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
  • Mitsuru Nakamura
    Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
  • Kyoko Nozaki
    Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan

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説明

Copolymerization of cyclohexene oxide with carbon dioxide was investigated by using chromium complexes with salalen ligands which are reduced analogues of salen ones (salen-H2 = N,N′-disalicylidene-1,2-ethylenediamine). Although the use of (salalen)CrCl complexes alone without additives was not effective for the copolymerization, a mixture of (salalen)CrCl complexes and onium salts catalyzed the copolymerization with relatively high catalytic activity. Particularly, the present catalyst system showed the highest catalytic activity under atmospheric pressure of CO2 among those ever reported. In general, the obtained copolymers consisted of almost perfectly alternating structure. Structural analysis of the copolymers by MALDI-TOF mass spectrometry revealed that chloride initiated the copolymerization. In addition, concomitant water was found to work as a chain transfer reagent and a bifunctional initiator.

収録刊行物

  • Macromolecules

    Macromolecules 42 (18), 6972-6980, 2009-08-21

    American Chemical Society (ACS)

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