Acta Chimica Sinica ›› 2010, Vol. 68 ›› Issue (18): 1871-1875. Previous Articles     Next Articles

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2,2 -联吡啶钌配合物催化CO2制备环状碳酸酯机理研究


  1. (1河南大学化学化工学院精细化工研究所 开封 475004)
    (2郑州大学材料科学与工程学院 郑州 450052)
  • 投稿日期:2010-04-22 修回日期:2010-06-29 发布日期:2010-07-27
  • 通讯作者: 卜站伟
  • 基金资助:


A Mechanistic Study for Cyclic Carbonate Formation from CO2 and Epoxides Catalyzed by Ruthenium 2,2 -Bipyridine Complex

Bu Zhanwei*,1 Wang Zhiqiang1 Qin Gang2 Cui Yuanchen1 Cao Shaokui*,2   

  1. (1 Research Institute of Fine Chemical Engineering, Henan University, Kaifeng 475004)
    (2 School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450052)
  • Received:2010-04-22 Revised:2010-06-29 Published:2010-07-27
  • Contact: BU Zhan-Wei

The cycloaddition of CO2 with various epoxides to afford cyclic carbonates was investigated via the catalysis of ruthenium 2,2 -bipyridine complex RuCl3(2,2 -bipy)(CH3OH) and hexadecyl trimethyl ammonium chloride (CTAC). The cyclic carbonate formation mechanism was studied by using electrospray ionization mass spectrometry (ESI-MS) in the case of cycloaddition of CO2 with propylene oxide (PO). Two intermediate complexes, RuCl3(2,2 -bipy)(PO) and RuCl3(2,2 -bipy)(PC), in the proposed reaction mechanism were successfully detected via ESI-MS measurement. Experimental results suggested that the initial coordination of epoxide is likely to occur first through the methanol ligand replacement in RuCl3(2,2 -bipy)(CH3OH). A nucleophilic attack of the chloride anion in CTAC on the less sterically hindered β-carbon atom of the coordinated epoxide is responsible for the epoxide ring-opening, CO2 succeedingly inserts into the Ru—O bond and ring-closure happens subsequently yielding the cyclic carbonate.

Key words: ruthenium 2,2 -bipyridine complex, catalysis, carbon dioxide, epoxides, mechanism