The introduction of bridging skeleton and bimetallic center into nitrogen-immobilized transition metal complexes provides a new idea for the design of auxiliary ligands for nitrogen-containing transition metal complexes. We expect to use various types of aryl rings as the bridging centers and -N(CH2CH2NHAr)2 as the connecting side arms to regulate the degree of dispersion and alignment of the two metal centers by changing the site resistance and electrical properties of the ligands. In turn, the multidentate bridging ligands form a “bimetallic pocket” with the dinuclear metal centers, which is expected to activate the nitrogen molecules more efficiently. Feedback from the metal to the dinitrogen molecule enhances the basicity of the nitrogen atom, with the M-N≡N species generated by the coordination (or reduction) of one metal contributing to the bonding with the second metal, while additional feedback from the second metal promotes the formation of a strong multi-bond between the metal and the dinitrogen ligand, and such synergistic interactions between bimetals, especially heteronuclear bimetals, may enable the functionalization of the two -N≡N- sites, contributing to the activation of the newly developed bimetallic ligands and to the activation of the newly developed nitrogen molecules. functionalization, contributing to the development of new developmental modes, such as cycloaddition reactions with unsaturated substrates or complex decomposition reactions.