Secondary Coordination Sphere Interactions Facilitate the Insertion Step in an Iridium(III) CO2 Reduction Catalyst

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• 作者：Timothy J. Schmeier ; Graham E. Dobereiner ; Robert H. Crabtree ; Nilay Hazari
• 刊名：Journal of the American Chemical Society
• 出版年：2011
• 出版时间：June 22, 2011
• 年：2011
• 卷：133
• 期：24
• 页码：9274-9277
• 全文大小：744K
• 年卷期：v.133,no.24(June 22, 2011)
• ISSN：1520-5126

文摘

There is considerable interest in both catalysts for CO₂ conversion and understanding how CO₂ reacts with transition metal complexes. Here we develop a simple model for predicting the thermodynamic favorability of CO₂ insertion into Ir(III) hydrides. In general this reaction is unfavorable; however, we demonstrate that with a hydrogen bond donor in the secondary coordination sphere it is possible to isolate a formate product from this reaction. Furthermore, our CO₂ inserted product is one of the most active water-soluble catalysts reported to date for CO₂ hydrogenation.