Ruthenium(II) complexes containing both arene and functionalized phosphines. Synthesis and catalytic activity for the hydrogenation of styrene and phenylacetylene

Isabel Moldes, Esther De La Encarnación, Josep Ros, Ángel Alvarez-Larena, Joan F. Piniella

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111 Citations (Scopus)

Abstract

The [RuCl2(η6-arene)]2 complex reacts with PPh2R (R=H, Py, CH2Py, CCPh, CCtBu and CCp-Tol) ligands in CH2Cl2 to give neutral P-coordinated ruthenium(II) complexes [RuCl2(p-cymene)PPh2R]. The structure of [RuCl2(p-cymene)PPh2H] and [RuCl2(p-cymene)PPh2Py] complexes has been established by X-ray diffraction. The neutral P-coordinated complexes [RuCl2(p-cymene)PPh2Py] and [RuCl2(p-cymene)PPh2CH2Py] react with NaBF4 in CH2Cl2-MeOH mixture to give [RuCl(η6-p-cymene)PPh2Py]BF4 and [RuCl(η6-p-cymene)PPh2CH2Py]BF4 complexes, in which PPh2Py and PPh2CH2Py act as bidentate ligands. The structure of [RuCl(η6-p-cymene)PPh2Py]BF4 was determined by X-ray diffraction. The reaction of [RuCl2(η6-arene)]2 with PPh2CCPPh2 led to the [RuCl2(p-cymene)]2PPh2CCPPh2 complex, in which the diphosphine ligand bridges two [RuCl2(p-cymene)] units. [RuCl2(p-cymene)PPh2Py] and [RuCl(η6-p-cymene)PPh2Py]BF4 are suitable catalyst precursors for the hydrogenation of styrene and phenylacetylene.
Original languageEnglish
Pages (from-to)165-174
JournalJ. Organomet. Chem.
Volume566
Issue number1-2
DOIs
Publication statusPublished - 15 Sep 1998

Keywords

  • Arene
  • Hydrogenation
  • Phosphine
  • Ruthenium

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