Highly Active Aluminium Catalysts for the Formation of Organic Carbonates from CO<sub>2</sub>and Oxiranes
作者:Christopher J. Whiteoak、Nicola Kielland、Victor Laserna、Fernando Castro-Gómez、Eddy Martin、Eduardo C. Escudero-Adán、Carles Bo、Arjan W. Kleij
DOI:10.1002/chem.201302536
日期:2014.2.17
scaffolds have been prepared to attain highly Lewis acidic catalysts. Combination of the aforementioned systems with ammonium halides provides highly active catalysts for the synthesis of organic carbonates through addition of carbon dioxide to oxiranes with initial turnover frequencies among the highest reported to date within the context of cyclic carbonate formation. Density functional theory (DFT) studies
氨基-三(酚盐)配体支架的Al III配合物已被制备以获得高度路易斯酸性催化剂。前述系统与卤化铵的组合提供了高活性的催化剂,用于通过将二氧化碳添加到环氧乙烷中来合成有机碳酸酯,所述环氧乙烷的初始周转频率是迄今为止在环状碳酸酯形成的背景下报道的最高频率。密度泛函理论(DFT)的研究与动力学数据相结合,为这些Al III配合物的相对较高的活性提供了一个合理的理由,并且该数据与单金属机制相符。这些Al III的活性和多功能性 还针对某些最先进的催化剂对络合物进行了评估,综合结果在催化剂的结构,稳定性,活性和适用性方面均具有可比性。