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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Journal Title, Volume, Page: 
Inorganica Chimica Acta Volume 357, Issue 6, 20 April 2004, Pages 1847–1853 Protagonists in Chemistry: Helmut Werner
Year of Publication: 
2004
Authors: 
Ismail Warad
Institut für Anorganische Chemie der Universität Tübingen, Auf der Morgenstelle 18, D-72076 Tubingen, Germany
Current Affiliation: 
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Klaus Eichele
Institut für Anorganische Chemie der Universität Tübingen, Auf der Morgenstelle 18, D-72076 Tubingen, Germany
Hermann A Mayer
Institut für Anorganische Chemie der Universität Tübingen, Auf der Morgenstelle 18, D-72076 Tubingen, Germany
Ekkehard Lindner
Institut für Anorganische Chemie der Universität Tübingen, Auf der Morgenstelle 18, D-72076 Tubingen, Germany
Current Affiliation: 
Preferred Abstract (Original): 
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.
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