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The ruthenium(II) complex cis-[RuCl 2 (PPh 3 ) 2 (L1)] ( 1 ) where L1 = 2-(2’-pyridyl)quinoline was obtained in high yield from the reaction of [RuCl 2 (PPh 3 ) 3 ] with L1. The new compound was characterized by different spectroscopic methods including FT-IR, UV-Vis, NMR ( 1 H,  31 P) spectroscopy along with a mass spectrometric analysis (ESI-MS) and conductivity measurements.  31 P NMR spectroscopy provided evidence that the two PPh 3  ligands are orientated  trans  to each other in an octahedral environment. Complex ( 1 ) was tested in the transfer hydrogenation of various ketones in 2-propanol at 82  o C. The catalytic activity of ( 1 ) displayed quantitative conversions for benzophenone and 4-chloroacetophenone.

A 2-(2’-pyridyl)quinoline ruthenium(II) complex as an active catalyst for the transfer hydrogenation of ketones