作者:Erin F. DiMauro、Marisa C. Kozlowski
DOI:10.1039/b101454o
日期:2002.1.23
The utility of phosphabenzenes as ligands in late transition metal catalysis is examined. Molecular orbital calculations indicate that phosphabenzenes possess a low lying LUMO permitting π-back bonding interactions. The resultant electron withdrawing nature of the phosphabenzenes is beneficial for reactions in which reductive elimination steps are rate-limiting. For example, phosphabenzenes were found to function well in nickel catalyzed [4 + 2] cycloadditions.
研究探讨了磷苯作为配体在后期过渡金属催化中的用途。分子轨道计算表明,磷苯具有低位 LUMO,允许 π 背键相互作用。由此产生的磷苯取电子特性有利于以还原消除步骤为速率限制的反应。例如,在镍催化的[4 + 2]环加成反应中,磷苯就发挥了很好的作用。