Supported organometallic complexes part 39: cationic diamine(ether–phosphine)ruthenium(II) complexes as precursors for the hydrogenation of trans-4-phenyl-3-butene-2-one

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• 作者：Warad ; Ismail ; Eichele ; Klaus ; Mayer ; Hermann A. ; Lindner ; Ekkehard
• 关键词：Ruthenium(II) complexes ; Crystal structure ; Hemilabile ligands ; Catalytic hydrogenation
• 刊名：Inorganica Chimica Acta
• 出版年：2004
• 期刊代码：40_00201693
• 类别：ch
• 出版时间：April 20, 2004
• 卷：357
• 期：6
• 页码：1847-1853
• 文件大小：377 K

摘要

Treatment of RuCl₂(η¹-Ph₂PCH₂CH₂OCH₃)₂(diamine) (1L₁–1L₇) with one equivalent of AgX (X=OTf, BF₄) in CH₂Cl₂ results in the formation of the monocationic ruthenium(II) complexes [RuCl(η¹-Ph₂PCH₂CH₂OCH₃)(η²-Ph₂PCH₂CH₂OCH₃)(diamine)]⁺X⁻ (2L₁–2L₇). These complexes were characterized by NMR, and mass spectroscopy as well as by elemental analyses, 2L₁ additionally by an X-ray structural analysis. Complex 2L₁ crystallizes in the monoclinic space group C2/c with Z=8. The monocationic and neutral complexes were applied as catalysts in the selective hydrogenation of trans-4-phenyl-3-butene-2-one. With the exception of 1L₃/1L₇ and 2L₃/2L₇ all catalysts showed high activities and selectivities toward the hydrogenation of the carbonyl group under mild conditions. However, the activity of the cationic catalysts is only half of that of their neutral congeners.