Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"Ligand Synthesis"”.
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Halfsandwich tungsten complexes with a silanol-functionalized cyclopentadienyl ligand : synthesis and reactivity
… silanol-functionalized at the cyclopentadienyl ligand. The stability and the condensation behavior have been investigated. Thus, it was shown that these complexes are stable enough for isolation but they are reactiv enough for time-effective condensation reactions with diverse chlorosilanes, …
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Palladium-catalyzed C-N cross-coupling reactions toward the synthesis of drug-like molecules
… of the substrates used in this study, a proposed ligand synthesis is discussed in which one of the methoxy groups of BrettPhos is replaced with a morpholine capable of occupying palladium's open coordination site during its catalytic cycle. A final C-N bond formation study focuses on the …
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Synthesis and reactivity of early transitional metal complexes supported by sterically demanding amido ligands
Chapter 1: Ligand Synthesis Strategies -- Chapter 2: Early Transition Metal Complexes of Bidentate N[R]ArL, o-Dimethylamino- N-tert-Butylanilide -- Chapter 3: Three-Coordinate Molybdenum(III) Complexes: Synthesis, Properties, and Nitrogen Atom Transfer Thereto -- Chapter 4: The …
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Robust Nickel Catalysts Supported By Biaryl-Bridged Pyridyl-N-Heterocyclic Carbenes For Carbon Dioxide Reduction To Value-Added Products
… pyridyl-N-heterocyclic carbene-based ligands and their corresponding nickel complexes. Ligand synthesis, structural characterization of complexes, and their application in electrocatalytic CO2 reduction are discussed.
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Design and synthesis of cyclometalated transition metal complexes as functional phosphorescent materials
… be fully tunable by modifying the coordinating ligands. In this thesis, a series of 2-(1,2,3-triazol-4-yl)-pyridine derivatives, referred to as the "click" ligands, are used to build phosphorescent Ir(III) and Pt(II) compounds. The robust and tolerant nature of the copper mediated 1,3-dipolar …
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Development of systems for isolation of high-valent nickel complexes and their reactivity
… pyridinophane (N4) and triazacyclononane (tacn) ligands for the isolation and study of high-valent nickel and palladium compounds, chiral variants of these ligands were synthesized in attempts to isolate high-valent organometallic nickel complexes that could play a role in enantioselective …
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Multidentate phosphino-alkene ligands and their late transition metal complexes
The synthesis and characterisation of a new class of multidentate conformationally flexible phosphino-alkene ligands, called dbaPHOS (127) and monodbaPHOS (128), are described is this PhD thesis. The related phosphine sulphide ligands, namely dbaTHIOPHOS (137) and monodbaTHIOPHOS (149), have also …
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Biochemical and spectroscopic insights into peculiar active site structures and biosynthesis of O2-tolerant [NiFe]-hydrogenases
… cysteine residues. Two of them serve as terminal ligands to the Ni and two are bridging ligands coordinating both, the Ni and Fe. The Fe is additionally equipped with one carbon monoxide (CO) and two cyanide (CN–) ligands. The maturation of the NiFe(CN)2(CO) active site involves at least six …
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Liquid-liquid extraction of rare earth elements from sulfuric acid
… binary mixtures, and ternary mixtures as well as synthesis of novel amide ligands for the extraction of rare earth elements. Chapter I is the general introduction of the practical process and applications of solvent extraction and its theory. It describes systems involving compound formation, …
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Rational Design of Catalytic Metal Complexes for Potential Applications in Anticancer Chemotherapy
… afforded an understanding of the optimal donor ligand(s) and structural motif required for both effective catalytic activity in redox-based chemical transformations and long-term stability in strict biologically relevant conditions. Cancer cell death via a redox imbalance can be caused by either …
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Synthesis, Properties, and Reactivity of Pentafluorophenyl Substituted Cyclopentadienes and Their Transition Metal Complexes
… such complex, ferrocene. Modifications of the Cp ligand framework effect changes in the physical properties and chemical reactivity of the coordinated transition metal. This concept is useful when applied to catalysis mediated by Cp complexes, because the performance of the catalyst can be …
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Studying Transition Metal Chemistry inside a Metal-Organic Framework
… from metal ‘nodes’ and interconnecting organic ligands. The combination of crystallinity, porosity and building block design allows MOFs to be tailored at the nanoscale and functionalised to suit specific applications. Reactive metal complexes can be installed inside MOFs, producing well-defined …
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Investigating the Cluster Chemistry of α-Methyl-2-pyridine methanol (mpmH) with Select 3d Ions
… of the potentially chiral bridging, chelating ligand, α-methyl-2-pyridinemethanol (mpmH) with select 3d ions for the discovery of polynuclear clusters with single molecule magnet (SMM) properties. Chapter 1 introduces the theory of molecular magnetism, SMMs and the concepts of chiral SMMs, …
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Improved Synthesis, Separation, Transition Metal Coordination and Reaction Chemistry of a New Binucleating Tetraphosphine Ligand
… complexes based on linear tetraphosphine ligand, PEt2CH2CH2(Ph)PCH2P(Ph)CH2CH2PEt2, et,ph-P4. Under conditions tested no alcohol products were detected. However we have observed formation of a small amount of oxidative cleavage products. Results from studies of oxidative cleavage reactions …
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Unsymmetrical tridentate phosphine ligands
… the preparation of unsymmetrical triphosphine ligands, which necessarily contain one central chiral phosphorus atom. The ttparent" tridentate phosphine is (2- diphenylphosphinoethyl)(3-diphenylphosphinopropyl) phenylphosphine, Ph2P(CH2)3PPh(CH2)2PPh2, "eptp". Other tridentates were prepared by …
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Synthesis of redox-active ligands and their use in hydrogenase modeling
… FeS cluster to relay electrons, CN and CO ligands to maintain low spin metal centers, and thiolate ligands and internal bases near the metal active sites. The inclusion of ferrodoxin clusters in both families of H2ases, as well as the fact that a ferredoxin cluster is present in the …
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Development & characterization of bio-inspired earth-abundant metal systems and extreme ultraviolet spectroscopy of precious metal photocatalysts
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-08-01