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Progress in Chemistry 1997, Vol. 9 Issue (03): 265- Previous Articles   Next Articles

• Review •

Discussion on the Activation Models of Dinitrogen by FeMo-Cofactor in Nitrogenase

Zhang Chunxi;Fan Hongjun;Liu Qiutian   

  1. (State Key Laboratory of Structural Chemistry, Fu jian Institute of Research on the Structure of Matter, Chinese Acadamy of Sciences, Fuzhou 350002, China)
  • Received: Revised: Online: Published:
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On discussing some activation models of dinitrogen by the active center,FeMo-cofactor of the nitrogenase based on experiments and theoretical calculations, a new activation model of dinitrogen has been suggested. In this model, the dinitrogen is coordinated to 4Fe and 2Fe atoms of FeMo-cofactor in“end-on”and“side-on”modes respectively, and is activated inside the FeMo-cofactor. Accompanying the complete cleavage of N≡N triple bond, both fragments containing Natomshift to the respective“window”on both sides of the FeMo-cofactor and are reduced in the hydrogenation process to form NH3which get off from the nearby“windows”.

Key words: nitrogenase, FeMo-cofactor, activation of dinitrogen, activation models

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