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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
131

The chemistry of organometallic derivatives of oligoacetylenic silanes

Wong, Chun Kin 01 January 2002 (has links)
No description available.
132

Synthesis, characterization and photophysics of alkynyl-derived inorganic and organometallic materials comprising group 13,14 and 16 elements

Poon, Suk Yue 01 January 2005 (has links)
No description available.
133

Synthesis, characterization and catalytic study of (9-anthryl)(iminophosphorano)methanide and (9-anthryl)(thiophosphinoyl)methanide metal complexes.

January 2010 (has links)
Ho, Ming Gong. / "October 2009." / Thesis (M.Phil.)--Chinese University of Hong Kong, 2010. / Includes bibliographical references (leaves 72-75). / Abstracts in English and Chinese. / Table of Contents --- p.V / Acknowledgements --- p.i / Abstract --- p.ii / 摘要 --- p.iv / List of Compounds Synthesized --- p.X / Abbreviation --- p.xi / Chapter Chapter 1 --- Synthesis and Characterization of (9-Anthryl)(iminophosphorano)methanide Group 14 Metal Complexes / Chapter 1.1 --- Introduction --- p.1 / Chapter 1.1.1 --- A General Review of Phosphoranoimine Ligands --- p.1 / Chapter 1.1.2 --- A General Review of Group 14 Metal Complexes Containing Phosphoranoimine Ligands --- p.8 / Chapter 1.2 --- Objectives --- p.9 / Chapter 1.3 --- Results and Discussion --- p.10 / Chapter 1.3.1.1 --- Synthesis of (9-Anthryl)(iminophosphorano)methanide Germanium(II) Chloride [Ge{CH(Pri2P=NSiMe3)(Anth)}Cl] (44) and (9-Anthryl)(iminophosphorano)methanide Tin(II) Chloride [Sn{CH(Pri2P=NSiMe3)(Anth)}Cl] (45) --- p.10 / Chapter 1.3.1.2 --- Spectroscopic Properties of 44 and 45 --- p.11 / Chapter 1.3.1.3 --- Molecular Structures of [Ge {CH(Pri2P=NSiMe3)(Anth)} Cl] (44) and [Sn{CH(Pri2P=NSiMe3)(Anth)} Cl] (45) --- p.11 / Chapter 1.3.2.1 --- Synthesis of Homoleptic Dialkylstannylene [Sn{CH(Pr/2P=NSiMe3)(Anth)}2] (46) --- p.16 / Chapter 1.3.2.2 --- Spectroscopic Properties of 46 --- p.17 / Chapter 1.3.2.3 --- Molecular Structure of [Sn{CH(Pri2P=NSiMe3)(Anth)}2] (46) --- p.17 / Chapter 1.4 --- Experimental Section --- p.20 / Chapter 1.5 --- References for Chapter 1 --- p.23 / Chapter Chapter 2 --- "Synthesis, Characterization and Catalytic Study of (9-Anthryl)(iminophosphorano)methanide Group 4 Metal Complexes" / Chapter 2.1 --- Introduction --- p.27 / Chapter 2.1.1 --- A General Review of Group 4 Metallocene Catalysts in Olefin Polymerization --- p.27 / Chapter 2.1.2 --- A General Review of Group 4 Metal Complexes --- p.28 / Chapter 2.2 --- Results and Discussion --- p.31 / Chapter 2.2.1.1 --- Synthesis of (9-Anthryl)(iminophosphorano)methanide Zirconium(IV) Chloride [Zr{CH(Pri2P=NSiMe3)(Anth)} 2CI2] (57) and (9-Anthryl)(iminophosphorano)methanide Hafnium(IV) Chloride [Hf{CH(Pri2P=NSiMe3)(Anth)}2Cl2] (58) --- p.31 / Chapter 2.2.1.2 --- Spectroscopic Properties of 57 and 58 --- p.32 / Chapter 2.2.1.3 --- Molecular Structures of [Zr{CH(Pri2P^NsiMe3)(Anth)}2CI2] (57) and [Hf{CH(Pri2P=NsiMe3)(Anth)}2Cl2] (58) --- p.32 / Chapter 2.3 --- Catalytic Study of Compounds 57 and 58 on Ethylene Polymerization --- p.37 / Chapter 2.4 --- Experimental Section --- p.39 / Chapter 2.5 --- Reference for Chapter 2 --- p.41 / Chapter Chapter 3 --- "Synthesis, Characterization and Catalytic Study of (9-Anthryl)(thiophosphinoyl)methanide Metal Complexes" / Chapter 3.1 --- Introduction --- p.45 / Chapter 3.2 --- A General Review of Phosphoranosulfide Ligands --- p.45 / Chapter 3.3 --- Objectives --- p.54 / Chapter 3.4 --- Results and Discussion --- p.55 / Chapter 3.4.1.1 --- Synthesis of (9-Anthryl)(thiophosphinoyl)methane [CH2(Pri2P=S)(Anth)] (92) and Lithium Compound [Li(THF)2{CH(Pr/2P=S)(Anth)}] (93) --- p.55 / Chapter 3.4.1.2 --- Spectroscopic Properties of 92 and 93 --- p.56 / Chapter 3.4.1.3 --- Molecular Structures of [Li(THF)2{CH(Pri2P=S)(Anth)}] (93) --- p.57 / Chapter 3.4.2.1 --- Synthesis of Germylgermylene [Ge(GeCl){CH(Pri2P=S)(Anth)}2C12C6H5CH3] (94) --- p.59 / Chapter 3.4.2.2 --- Spectroscopic Properties of 94 --- p.61 / Chapter 3.4.2.3 --- Molecular Structure of [Ge(GeCl){CH(Pri2P=S)(Anth)}2Cl2C6H5CH3] (94) --- p.61 / Chapter 3.4.3.1 --- Synthesis of (9-Anthryl)(thiophosphinoyl)methanide Zirconium(IV) Complex [Zr{CH(Pri2P=S)(Anth)}2Cl2(THF) THF] (95) --- p.64 / Chapter 3.4.3.2 --- Spectroscopic Properties of 95 --- p.64 / Chapter 3.4.3.3 --- Molecular Structure of [Zr{CH(Pri2P=S)(Anth)}2Cl2(THF) THF] (95) --- p.65 / Chapter 3.4.3.4 --- Catalytic Study of [Zr{CH(Pri2P=S)(Anth)}2Cl2(THF) THF] (95)i --- p.68 / Chapter 3.5 --- Experimental Section --- p.69 / Chapter 3.6 --- References for Chapter 3 --- p.72
134

Characterization of Zinc-containing Metalloproteins by Resonance Raman Spectroscopy

Derry, Robert Edward 18 September 1974 (has links)
Cobalt-substituted carboxypeptidase and carbonic anhydrase were chosen as candidates for resonance Raman spectroscopy because they possess visible absorption due to the Co(II)-protein complex. However, no evidence for resonance-enhanced peaks due to the cobalt-containing chromophore was found with laser excitation near the visible absorption bands (514.5 nm) or closer to the ultraviolet absorption bands (457.9nm). Arsanilazocarboxypeptidase and model azotyrosine compounds were selected for a Raman spectroscopic investigation because they have intense absorption bands in the visible region. All of these substances yielded similar resonance Raman spectra. Although there was no evidence for specific zinc-ligand vibrations, shifts in vibrational frequencies of the azotyrosine chromophore could be used as proof of zinc complexation. The protonated azotyrosine model compound was found to have the phenoxy group hydrogen bonded to the azo group, forming a six-membered ring. Replacement of the proton by zinc resulted in the zinc atom being bound only to the phenoxy group. In arsanilazocarboxypeptidase the azotyrosine at position 248 in the polypeptide chain was found to have a structure similar to the protonated model compound, a six-membered ring with zinc bridging the phenoxy group and the azo group. This gave further proof that Tyr 248 is close to the zinc atom in the native enzyme, even in the absence of substrate.
135

Femtosecond study of the solvent cage effect : the ultrafast photodissociation and geminate recombination of organometallic dimers /

Oelkers, Alan Brian, January 2007 (has links)
Thesis (Ph. D.)--University of Oregon, 2007. / Typescript. Includes vita and abstract. Includes bibliographical references (leaves 178-191). Also available for download via the World Wide Web; free to University of Oregon users.
136

Raman spectroscopic evidence for side-on binding of peroxide ion to ferric EDTA

Ahmad, Salman 09 1900 (has links) (PDF)
M.S. / Chemistry / Resonance Raman spectra of the complex of FeIII-ethylenediamine-tetraacetate with hydrogen peroxide have been obtained in the region of the peroxidic O-O stretching vibration that occurs at 815 cm [superscript -1] in frozen solution. When the complex was prepared from nearly neat, mixed-isotope hydrogen peroxide, H216O18O, a single O-O vibration was observed at 794 cm [superscript -1]. This observation establishes that the two oxygen atoms of the bound peroxide are equivalent and that the peroxide is ligated in an η2 side-on configuration in this mononuclear complex. The absence of any shift in υ(O-O) when the complex was prepared in D2O solvent provides further support for the Fe-OO geometry and rules out the alternative η1 end-on Fe-OOH configuration. In contrast, υ(O-O) of free hydrogen peroxide in the frozen state occurs at 877 cm [superscript -1] in H2Oand at 879 cm [superscript -1] in D2O. The 2- cm [superscript -1] upshift in D2O is similar to that observed previously with oxyhemerythrin and appears to be characteristic of a hydrogen-bonded or protonated peroxide species.
137

Studies of the reactivities of organometallic complexes containing platinum(IV)-oxygen bonds /

Williams, Burke Scott. January 2000 (has links)
Thesis (Ph. D.)--University of Washington, 2000. / Vita. Includes bibliographical references (leaves 179-189).
138

Design and development of novel phosphine - based chelating systems for chemical and biomedical motifs /

Gali, Hariprasad, January 1999 (has links)
Thesis (Ph. D.)--University of Missouri-Columbia, 1999. / Typescript. Vita. Includes bibliographical references. Also available on the Internet.
139

Design and development of novel phosphine - based chelating systems for chemical and biomedical motifs

Gali, Hariprasad, January 1999 (has links)
Thesis (Ph. D.)--University of Missouri-Columbia, 1999. / Typescript. Vita. Includes bibliographical references. Also available on the Internet.
140

Organometallic catalysis in aqueous solution : reactions and mechanisms of water-soluble molybdocenes /

Breno, Kerry L., January 2004 (has links)
Thesis (Ph. D.)--University of Oregon, 2004. / Typescript. Includes vita and abstract. Includes bibliographical references (leaves 213-252). Also available for download via the World Wide Web; free to University of Oregon users.

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