Browsing by Author "Morris, David"

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    Design and Modification of Half-Sandwich Ir(III), Rh(III), and Ru(II) Amino Acid Complexes for Application in Asymmetric Transfer Hydrogenation Reactions
    Morris, David (Virginia Tech, 2015-01-28)
    This dissertation describes the design and synthesis of a series of half-sandwich amino acid complexes of the form), (aa = α-amino carboxylate), and their utility as asymmetric transfer hydrogenation catalysts of ketones. Variation of the metal center, the n-ring, and the aa was used to tune these systems for specific sets of ketones. Upon reaction with homochiral]s, the ligand environment in all of these complexes is pseudotetrahedral, leading to stereogenic metal ions (SM, RM). The addition of another stereogenic center from the amino acid ligand (the carbon, RC or SC;glycine) gives rise to two pairs of diastereomeric complexes.
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    Di-μ2-chlorido-bis-[chlorido(η(5)-2,3,4,5-tetra-methyl-1-propyl-cyclo-penta-dien-yl)iridium(III)].
    Merola, Joseph S.; Morris, David; De Weerd, Nicholas (International Union of Crystallography, 2013-03-01)
    The asymmetric unit of the title complex, [Ir2Cl4(C12H19)2], a versatile starting material for the preparation of uniquely substituted penta-alkyl-cyclo-penta-dien-yl-iridium complexes, consists of an iridium(III) atom, a substituted cyclo-penta-dienyl ligand and two chlorine ligands. The full dimer is generated by an inversion center. In the dimer, the two Ir(III) atoms and two bridging Cl atoms form a perfectly planar ring. The two Ir(III) atoms and the two terminal Cl atoms also form a rigorous plane that is orthogonal [89.48 (3)°] to the Ir2Cl2 ring. The plane of the cyclo-penta-dienyl ligand forms a dihedral angle of 54.06 (7)° with respect to the Ir2Cl2 ring.