Chemical Research in Chinese Universities ›› 1994, Vol. 10 ›› Issue (3): 211-219.

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Kinetic Studies on Axial Coordination Reaction ofTetraphenylporphinatocobalt(Ⅱ) Chloride

XIA Xin1, ZHU Zhi-ang2, CHEN Yun-ti2   

  1. 1. Dept. of Chem., Beijuig Sci & Tech, Univ., Beijing, 100083;
    2. Dept. of Chem., Nanlai University, Tianjin, 300071
  • Received:1993-06-13 Online:1994-08-24 Published:2011-08-17
  • Supported by:

    Supported by the National Natural Science foundation of China.

Abstract: The axial coordination reactions of tetraphenylporphinatocobalt (Ⅲ) chloride(Co TPPCl) with various imidazoles RIm (HIm .imidazole; Melm, 2-methylimida-zole) were investigated in acetone and dichloromethand solvents at different temper-atures.The reaction mechanisms were proposed and the differences between experi-mental results in the two solvents h ave been interpreted using the proposed mecha-nisms and rate equations for the first time, and the reaction scheme for the axial re-action of the metalloporphyrin has been developed.Hydrogen bonding plays an im-portant role in the reactions.The effects of various imidazoles for these reactionsand the solvents are reported.The comparison between iron and cobalt porphyrinsin the kinetics are discussed.

Key words: Porphyrin, Axial coordination reaction, Kinetics, Mechanism