Catalytic Reduction of Dinitrogen into Ammonia and Hydrazine Using Chromium Complexes Bearing PCP-Type Pincer Ligand

16 July 2021, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


A series of chromium–halide, –nitride, and –dinitrogen com-plexes bearing a carbene- and phosphine-based PCP-type pin-cer ligand is newly prepared and some of them are found to work as effective catalysts to reduce dinitrogen under atmos-pheric pressure, whereby up to 8.40 equiv of ammonia and 2.46 equiv of hydrazine (13.32 equiv of fixed N atom) are produced based on the chromium atom. To the best of our knowledge, this is the first successful example of chromium-catalyzed conversion of dinitrogen to ammonia and hydrazine under mild reaction conditions.


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