Four ruthenium(II) complexes 1—4 [RN=CH‐(2,4‐(^tBu)₂C₆H₂O)]RuH(PPh₃)₂(CO) (R = C₆H₅, 1; R = 4‐MeC₆H₄, 2; R = 4‐ClC₆H₄, 3; R = 4‐BrC₆H₄, 4) bearing Schiff base ligands were prepared by treating RuHClCO(PPh₃)₃ with RN=CH‐(2,4‐(^tBu)₂C₆H₂OH (L1—L4) in the presence of triethylamine. Their structures were fully characterized by elemental analysis, IR, NMR spectroscopy and X‐ray crystallography. These Ru(II) complexes exhibit high catalytic performance and good functional‐group compatibility in the acceptorless dehydrogenation of secondary alcohols, affording the corresponding ketones in 82%—94% yields.

中文翻译：

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带有席夫碱配体的钌（II）配合物可有效地进行仲醇的无受体脱氢†

四个钌（II）配合物1-4 [RN = CH-（2,4-（^t Bu）₂ C ₆ H ₂ O）] RuH（PPh ₃）₂（CO）（R = C ₆ H _5，1 ; R = 4-MEC ₆ ħ ₄，2; R = 4-CLC ₆ ħ ₄，3; R = 4- BRC ₆ ħ ₄，4）的轴承的席夫碱配体通过处理制备RuHClCO（PPH ₃）₃与RN = CH‐（2,4‐（^t Bu）₂碳₆ H ₂在三乙胺存在下的OH（L1-L4）。它们的结构已通过元素分析，IR，NMR光谱和X射线晶体学充分表征。这些Ru（II）配合物在仲醇的无受体脱氢反应中显示出高催化性能和良好的官能团相容性，提供相应的酮，产率为82％-94％。