Catalytic Reduction of Dinitrogen into Ammonia and Hydrazine by Using Chromium Complexes Bearing PCP‐Type Pincer Ligands**

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  • Yuya Ashida
    Department of Applied Chemistry, School of Engineering The University of Tokyo Hongo, Bunkyo-ku Tokyo 113-8656 Japan
  • Akihito Egi
    Institute for Materials Chemistry and Engineering Kyushu University Nishi-ku, Fukuoka Japan
  • Kazuya Arashiba
    Department of Applied Chemistry, School of Engineering The University of Tokyo Hongo, Bunkyo-ku Tokyo 113-8656 Japan
  • Hiromasa Tanaka
    School of Liberal Arts and Sciences Daido University Minami-ku Nagoya Japan
  • Taichi Mitsumoto
    Department of Applied Chemistry, School of Engineering The University of Tokyo Hongo, Bunkyo-ku Tokyo 113-8656 Japan
  • Shogo Kuriyama
    Department of Applied Chemistry, School of Engineering The University of Tokyo Hongo, Bunkyo-ku Tokyo 113-8656 Japan
  • Kazunari Yoshizawa
    Institute for Materials Chemistry and Engineering Kyushu University Nishi-ku, Fukuoka Japan
  • Yoshiaki Nishibayashi
    Department of Applied Chemistry, School of Engineering The University of Tokyo Hongo, Bunkyo-ku Tokyo 113-8656 Japan

Abstract

<jats:title>Abstract</jats:title><jats:p>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.</jats:p>

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