Synthesis and Catalytic Evaluation of Ruthenium–Arene Complexes Bearing Imidazol(in)ium-2-thiocarboxylate Ligands
作者:Morgan Hans、Quentin Willem、Johan Wouters、Albert Demonceau、Lionel Delaude
DOI:10.1021/om2006529
日期:2011.11.28
iocarboxylate zwitterions bearing cyclohexyl, 2,4,6-trimethylphenyl (mesityl), or 2,6-diisopropylphenyl groups on their nitrogen atoms in CH2Cl2 at −20 °C. All the products were fully characterized by IR and NMR spectroscopy, and the molecular structures of [RuCl2(p-cymene)(SOC·IMes)] (3) and [RuCl2(p-cymene)(SOC·SIMes)] (5) were determined by X-ray diffraction analysis. Coordination of the NHC·COS
与通式五个新络合物将[RuCl 2(p -cymene)(SOC · NHC)](2 - 6)通过将[RuCl反应以高收率进行分离2(p -cymene)] 2二聚体与一系列咪唑的在-20°C下,CH 2 Cl 2中氮原子上带有环己基,2,4,6-三甲基苯基(甲磺酰基)或2,6-二异丙基苯基的(二)2-硫代羧酸盐两性离子。所有产物均通过IR和NMR光谱进行了充分表征,[RuCl 2(p- Cymene)(SOC · IMes)](3)和[RuCl通过X射线衍射分析确定了2(对-异丙基)(SOC · SIMes)](5)。NHC · COS配体通过硫原子进行配位。上的次甲基质子的一个显着屏蔽p通过观察-cymene异丙基1个H NMR光谱对络合物3 - 6。这很可能是由相邻的1,3,6-二异丙基苯基取代基的芳环电流引起的。化合物2 – 6的催化活性在环辛烯的开环复分解聚合(ROMP),甲基丙