Organometallic Iridium Complexes of (<i>Z</i>)-1-Phenyl-2-(4′,4′-dimethyl-2′-oxazolin-2′-yl)-eth-1-en-1-ate: Structural Aspects, Reactivity and Applications in the Catalytic Dehydrogenation of Alkanes

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  • Kathleen L May
    Department of Chemistry & Biology, Ryerson University, 350 Victoria Street, Toronto, ON M5B 2K3 , Canada
  • Roxanne Clément
    Centre for Catalysis Research & Innovation, University of Ottawa, Ottawa, ON K1N 6N5 , Canada
  • Alan J Lough
    X-ray Laboratory, Department of Chemistry, University of Toronto, Toronto, ON M5H 3H6 , Canada
  • Robert A Gossage
    Department of Chemistry & Biology, Ryerson University, 350 Victoria Street, Toronto, ON M5B 2K3 , Canada

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<jats:title>Abstract</jats:title> <jats:p>The treatment of [IrCl(cod)]2 with (Z)-1-phenyl-2-(4′,4′-dimethyl-2′-oxazolin-2′-yl)-eth-1-en-1-ol (HL) in the presence of base yields the first Ir complex of this ligand class: Ir(κ2-N,O-L)(cod) (3). Complex 3 is reactive with MeI or HSnPh3 to yield the oxidative addition products 4 (trans-Ir(Me)I(κ2-N,O-L)(cod)) and 5 (cis-IrH(SnPh3)(κ2-N,O-L)(cod)), respectively. All three of these derivatives have been fully characterised including via single crystal X-ray diffraction data. Complex 3 is generally resistant to cod ligand substitution but shown to be reactive with CO (g) to give Ir(κ2-N,O-L)(CO)2 (6). In addition, 3 is demonstrated to be a dehydrogenation catalyst for the conversion of C8H16 into cyclooctene and H2 under acceptor-free conditions.</jats:p>

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