Rh(CAAC)-Catalyzed Arene Hydrogenation: Evidence for Nanocatalysis and Sterically Controlled Site-Selective Hydrogenation
作者:Ba L. Tran、John L. Fulton、John C. Linehan、Johannes A. Lercher、R. Morris Bullock
DOI:10.1021/acscatal.8b02589
日期:2018.9.7
starting from [(CAAC)Rh(COD)Cl] (CAAC = cyclic alkyl amino carbene). Kinetic, mechanistic, and Rh K-edge XAFS studies showed formation of Rh nanoparticles from [(CAAC)Rh(COD)Cl], in contrast to a previous report of [(CAAC)Rh(COD)Cl] functioning as a homogeneous catalyst for arene hydrogenation. We determined that the site-selective arene hydrogenation catalyzed by this system is under steric control, as
我们从[(CAAC)Rh(COD)Cl](CAAC =环状烷基氨基卡宾)开始,在室温和低氢气压下报告了醚,酰胺和酯的芳烃加氢反应。动力学,力学和Rh K-edge XAFS研究表明,由[(CAAC)Rh(COD)Cl]形成Rh纳米颗粒,与先前报道的[(CAAC)Rh(COD)Cl]起均相催化剂的作用形成鲜明对比。芳烃氢化。我们确定了该系统催化的位点选择性芳烃加氢是在空间控制下的,这是由醚,酰胺和酯的衍生物进行的竞争实验所显示的,这些醚,酰胺和酯带有不同的电子和空间影响的不同芳环。这项工作说明了CAAC配体在稳定纳米颗粒催化剂的胶体分散体的形成和稳定中的潜力。