Heterobimetallic Complexes Bridged by Imidazol{[4,5-<i>f</i>][1,10]-phenanthrolin}-2-ylidene: Synthesis and Catalytic Activity in Tandem Reactions
作者:Lütfiye Gök Pezük、Betül Şen、F. Ekkehardt Hahn、Hayati Türkmen
DOI:10.1021/acs.organomet.8b00882
日期:2019.1.28
and the homobimetallic complex (M/M′ = Ir/Ir 10). The new complexes were characterized by elemental analysis, FTIR, UV–vis, and NMR spectroscopy. The molecular structures of the heterobimetallic complexes 5 and 6 were determined by X-ray diffraction studies. The catalytic activity of the heterobimetallic complexes 5–9 were tested in selected tandem reactions (dehalogenation/transfer hydrogenation and
通过在1,3-二丁基-1H-咪唑[4,5- f ] [1,10]菲啉olin六氟磷酸盐1(M = Pd 2,Ru 3,Ir 4)中菲咯啉供体的金属化获得的一系列单金属配合物)已经准备好了。随后,复合物的咪唑基部分2 - 4被金属化以M',从而导致的异菲咯啉/ NHC络合物(M / M'=钯/铑5,将Pd /铱6,将Pd /钌7,钌/钯8, Ir / Pd 9)和同双金属配合物(M / M'= Ir / Ir 10)。通过元素分析,FTIR,UV-vis和NMR光谱对新复合物进行了表征。异双金属配合物5和6的分子结构通过X射线衍射研究确定。双核配合物的催化活性5 - 9在选定的串联反应(脱卤/转移氢化和铃木-宫浦耦合/转移氢化)进行了测试。发现与单核配合物M和M'的等摩尔混合物相比,M / M'杂双金属配合物显示出更高的催化活性,因此表明一种配合物中金属原子数目的增加导致了该活性的增加。串联反应。