Catalytic Reduction of Dinitrogen into Ammonia and Hydrazine by Using Chromium Complexes Bearing PCP‐Type Pincer Ligands**
Yuya Ashida, Akihito Egi, Kazuya Arashiba, Hiromasa Tanaka, Taichi Mitsumoto, Shogo Kuriyama, Kazunari Yoshizawa, Yoshiaki Nishibayashi
Abstract
A series of chromium-halide, -nitride, and -dinitrogen complexes bearing carbene- and phosphine-based PCP-type pincer ligands has been newly prepared, and some of them are found to work as effective catalysts to reduce dinitrogen under atmospheric pressure, whereby up to 11.60 equiv. of ammonia and 2.52 equiv. of hydrazine (16.6 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.
Topics & Concepts
Hydrazine (antidepressant)ChromiumAmmoniaChemistryCatalysisPhosphineMedicinal chemistryPincer movementInorganic chemistryCarbenePalladiumAminationPolymer chemistryOrganic chemistryChromatographyAmmonia Synthesis and Nitrogen ReductionCarbon dioxide utilization in catalysisOrganometallic Complex Synthesis and Catalysis