The efficient reuse of homogeneous catalyst is important. Cation complex of [Ru(η6 -p-cymene)(PPh3 )(CH3 CN) Cl]PF6 with different ligands was synthesized and characterized by infrared spectroscopy (IR),1 H-,13 C- and31 P-nuclear magnetic resonance spectroscopy (1 H-,1 3C- and31 P-NMR), element analysis (EA), and high resolution mass spectrometry (HR-MS). The complex was used as a catalyst for the hydrogen transfer reduction of carbonyl for the first time, presenting an excellent catalytic performance of 89%–98% conversion of acetophenone and its derivatives. The catalyst may be efficiently reused by the electro-adsorption of 10 times to one catalyst recovery. The cation [Ru] complex presented advantages of both homogeneous and heterogeneous catalysts.
