The novel ruthenium(II) complexes [RuCl$_2}$(NHC)($p$-cymene)], \textbf3a}--\textbfe}, containing 1-alkyl-3-benzylimidazol-2-ylidene ligands were prepared. All synthesized compounds were characterized by NMR spectroscopy and elemental analyses. Ru(II)-NHC complexes were tested as catalysts for the transfer hydrogenation of acetophenone, showing modest to high activity in this reaction. The results revealed that efficiencies depend on the substituents of the benzene ring of the benzyl on the N atom of the NHC ring.
含1-烷基-3-苄基
咪唑啉-2-亚基
配体的新型
钌(II)配合物[RuCl$_2}$(NHC)($p$-
枯烯)],**3a**--**e**,已被制备。所有合成的化合物均通过核磁共振波谱和元素分析进行了表征。
钌(II)-NHC配合物被测试为
乙酰苯的转移氢化反应的催化剂,显示出适中至高的活性。结果表明,效率取决于NHC环上N原子上的苄基苯环的取代基。