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  • Title: Rhodium and iridium complexes containing diphenyl-2-(3-methyl)indolylphosphine: synthesis, structure and application in the catalytic transfer hydrogenation of ketones.
    Author: Kuo YY, Haddow MF, Pérez-Redondo A, Owen GR.
    Journal: Dalton Trans; 2010 Jul 21; 39(27):6239-48. PubMed ID: 20523959.
    Abstract:
    The synthesis and characterisation of a number of group nine complexes containing the recently reported ligand, diphenyl-2-(3-methyl)indolylphosphine, is presented herein. The complexes [RhCl(COD){PPh(2)(C(9)H(8)N)}] (1), [IrCl(COD){PPh(2)(C(9)H(8)N)}] (2), [RhCl(NBD){PPh(2)(C(9)H(8)N)}] (3) and [Rh(COD)(MeCN){PPh(2)(C(9)H(8)N)}]BF(4) (4) (where COD = 1,5-cyclooctadiene, NBD = 2,5- norbornadiene) have been structurally characterised by X-ray crystallography. The complex [Rh(2)(COD)(2){N(Me)[double bond, length as m-dash]C(H)Ph)}{PPh(2)(C(9)H(8)N)}][BF(4)](2) (8) was also isolated and structurally characterised. Complex 8 contains a '[Rh(COD)]' fragment coordinated to the aromatic ring of the indolyl group, providing the first example of a eta(6) coordination mode for this ligand. The synthesised complexes were investigated for their activity in the catalytic transfer hydrogenation of ketones and found to be moderately active catalysts.
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