Biological nitrogen-fixation catalyzed by redox enzymes is a subject that biochemists and chemists are interested in. Because of the difficulties in determining the structure of protein, chemical simulation of active site is an efficient method at present. Black Roussinate Monoanion (BRM) is a primary synthetic model compound (Fig. 1) for nitrogenase with molecular structure similar to Fuzhou Model I proposed by Lu Jiaxi et al.. Its Biological nitrogen-scheduled catalyzed by redox enzymes is a subject that biochemists and chemists are interested in. Because of the difficulties in determining the structure of protein, chemical simulation of active site is an efficient method at present. Black Roussinate Monoanion (BRM) is a primary synthetic model compound (Fig. 1) for nitrogenase with molecular structure similar to Fuzhou Model I proposed by Lu Jiaxi et al .. Its