Cyclic metal(oid) clusters control platinum-catalysed hydrosilylation reactions: from soluble to zeolite and MOF catalysts
作者:Miguel Rivero-Crespo、Judit Oliver-Meseguer、Klaudia Kapłońska、Piotr Kuśtrowski、Emilio Pardo、José Pedro Cerón-Carrasco、Antonio Leyva-Pérez
DOI:10.1039/d0sc02391d
日期:——
alkynes, carbonyls and alcohols, i.e. the hydrosilylation reaction, is a fundamental transformation in industrial and academic chemistry, often claimed as the most important application of Pt catalysts in solution. However, the exact nature of the Pt active species and its mechanism of action is not well understood yet, particularly regarding regioselectivity. Here, experimental and computational studies
Pt催化的硅烷向官能团(例如烯烃,炔烃,羰基和醇)的加成反应(即氢化硅烷化反应)是工业和学术化学领域的根本转变,通常被认为是Pt催化剂在溶液中最重要的应用。但是,Pt活性物质的确切性质及其作用机理尚未得到很好的理解,特别是在区域选择性方面。在此,进行实验和计算研究以及专案图解法表明,炔烃的加氢反应是通过3–5个原子的Pt–Si–H簇(金属(类)缔合)以百万分之几(ppm)的量进行的,这降低了过渡态的能量并指示了C2的区域选择性。反应。基于这些发现,已经开发出了用于炔烃,烯烃和醇的氢化硅烷化的新型极活泼(ppm)微孔固体催化剂,为更环保的工业应用铺平了道路。