Highly Active Iron Catalyst for Ammonia Borane Dehydrocoupling at Room Temperature

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• 作者：Arne Gl眉er ; Moritz F枚rster ; Vinicius R. Celinski ; J枚rn Schmedt auf der G眉nne ; Max C. Holthausen ; Sven Schneider
• 刊名：ACS Catalysis
• 出版年：2015
• 出版时间：December 4, 2015
• 年：2015
• 卷：5
• 期：12
• 页码：7214-7217
• 全文大小：337K
• ISSN：2155-5435

文摘

The iron complex [FeH(CO) (PNP)] (PNP = N(CH₂CH₂PiPr₂)₂) is a highly active catalyst for ammonia borane dehydrocoupling at room temperature. Mainly linear polyaminoborane is obtained upon release of 1 equiv of H₂. Mechanistic studies suggest that both hydrogen release and B鈥揘 coupling are metal-catalyzed and proceed via free aminoborane. Catalyst deactivation results from reaction with free BH₃ that is formed by aminoborane rearrangement. Importantly, borane trapping with a simple amine allows for the observation of a TON that is unprecedented for a well-defined base metal catalyst.