New chemistry with gold-nitrogen complexes: synthesis and characterization of tetra-, tri-, and dinuclear gold(I) amidinate complexes. Oxidative-addition to the dinuclear gold(I) amidinate

dc.contributorFackler, J. P.
dc.creatorAbdou, Hanan Elsayed
dc.date.accessioned2010-01-15T00:14:38Z
dc.date.accessioned2010-01-16T02:03:52Z
dc.date.accessioned2017-04-07T19:56:40Z
dc.date.available2010-01-15T00:14:38Z
dc.date.available2010-01-16T02:03:52Z
dc.date.available2017-04-07T19:56:40Z
dc.date.created2006-05
dc.date.issued2009-06-02
dc.description.abstractNitrogen ligands have been little studied with gold(I) and almost no chemistry has been described using anionic bridging nitrogen ligands. This dissertation concerns the impact of the bridging ligands amidinate, ArNHC(H)NAr, on the chemistry of gold(I) and, in particular, the effect of substituents on the molecular arrangement. The electronic vs. steric effect of the substituents on the molecular arrangement of gold(I) amidinates complexes is studied in detail. Tetra-, tri-, and dinuclear gold(I) amidinate complexes are synthesized and characterized using X-ray diffraction. Spectroscopic and electrochemical studies of the amidinate complexes are described. Catalytic studies suggest that gold amidinates and related gold nitrogen complexes are the best catalyst precursors for CO oxidation on TiO2 surface reported to date (87% conversion). The dinuclear gold(I) amidinate complex with a Au? ?Au distance of 2.711(3) ? is rare. To our knowledge, there is only one other example of a symmetrical dinuclear gold(I) nitrogen complex. Oxidative-addition reactions to the dinuclear gold(I) complex, [Au2(2,6-Me2-form)2] are studied in detail and result in the formation of gold(II) complexes. The gold(II) amidinate complexes are the first formed with nitrogen ligands. The complexes are stable at room temperature. Mixed ligand tetranuclear gold(I) clusters and tetranuclear mixed Au-Ag metal clusters of pyrazolate and amidinate ligands are synthesized and characterized using Xray diffraction.
dc.identifier.urihttp://hdl.handle.net/1969.1/ETD-TAMU-1705
dc.language.isoen_US
dc.subjectGold
dc.subjectamidinate
dc.subjectoxidative-addition
dc.titleNew chemistry with gold-nitrogen complexes: synthesis and characterization of tetra-, tri-, and dinuclear gold(I) amidinate complexes. Oxidative-addition to the dinuclear gold(I) amidinate
dc.typeBook
dc.typeThesis

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