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Catalytic Activity of Molybdenum Complexes Bearing PNP-Type Pincer Ligand toward Ammonia Formation |
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| Authors: | Taichi Mitsumoto Dr Yuya Ashida Dr Kazuya Arashiba Dr Shogo Kuriyama Akihito Egi Prof?Dr Hiromasa Tanaka Prof?Dr Kazunari Yoshizawa Prof?Dr Yoshiaki Nishibayashi |
| Institution: | 1. Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan;2. Institute for Materials Chemistry and Engineering, Kyushu University, Nishi-ku, Fukuoka, Japan;3. School of Liberal Arts and Sciences, Daido University, Minami-ku, Nagoya, Japan |
| Abstract: | We newly designed and prepared a novel molybdenum complex bearing a 4-3,5-bis(trifluoromethyl)phenyl]pyridine-based PNP-type pincer ligand, based on the bond dissociation free energies (BDFEs) of the N?H bonds in molybdenum-imide complexes bearing various substituted pyridine-based PNP-type pincer ligands. The complex worked as an excellent catalyst toward ammonia formation from the reaction of an atmospheric pressure of dinitrogen with samarium diiodide as a reductant and water as a proton source under ambient reaction conditions, where up to 3580 equivalents of ammonia were formed based on the molybdenum atom of the catalyst. The catalytic activity was significantly improved by one order of magnitude larger than that observed when using the complex before modification. |
| Keywords: | Ammonia Molybdenum PNP-Type Pincer Ligand Substituent Effect Water |