Highly Active Iron Catalyst for Ammonia Borane Dehydrocoupling at Room Temperature
Highly Active Iron Catalyst for Ammonia Borane Dehydrocoupling at Room Temperature
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DOI：
10.1021/acscatal.5b02406
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发表时间：
2015-12-01
期刊：
影响因子：
12.9
通讯作者：
Schneidert, Sven
中科院分区：
文献类型：
--
作者：
Glueer, Arne;Foerster, Moritz;Schneidert, Sven
铁配合物[FeH（CO）（PNP）]（PNP = N-（CH（2）CH（2）PiPr（2））（2））是一种室温下高活性的氨硼烷脱氢偶联催化剂。在释放1当量的H-2时获得主要线性的聚氨基硼烷。机理研究表明，氢释放和B-N偶联都是金属催化的，并通过游离氨基硼烷进行。催化剂失活的原因是与氨基硼烷重排形成的游离BH 3反应。重要的是，用简单胺捕获硼烷允许观察到TON，这对于明确定义的贱金属催化剂是前所未有的。
The iron complex [FeH(CO) (PNP)] (PNP = N-(CH(2)CH(2)PiPr(2))(2)) is a highly active catalyst for ammonia borane dehydrocoupling at room temperature. Mainly linear polyaminoborane is obtained upon release of 1 equiv of H-2. Mechanistic studies suggest that both hydrogen release and B-N 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.