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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 20 of 96 for “"Bond cleavage"”.

  1. Anchimerically Assisted Homolytic Bond Cleavage

    Bentrude, Wesley GeorgeUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-05T19:37:44Z (GMT). No. of bitstreams: 1 6104257.pdf: 9136630 bytes, checksum: ec6059f438cb384b3dcc9942728411ce (MD5) Previous issue date: 1961

    uiuc Repository record

  2. Oxidative Aliphatic Carbon-Carbon Bond Cleavage Reactions

    Allpress, Caleb J.

    utahstate Repository record

  3. Designed Bond Cleavage Reactions for Next-Generation Therapeutics

    Vickraman Nair Bindu, UnnikrishnanUniversity of Cambridge2024

    … first project focuses on a metal-mediated amide bond-cleavage reaction from a pentenoic group by using Au salt (Na[AuCl4]) for prodrug activation in aqueous systems. Central to this strategy is a cyclisation step involving the formation of a 5-membered ring intermediate that undergoes rapid …

    cambridge Repository record

  4. DNA catalysts for amide bond cleavage and for lysine side chain modification

    Brandsen, Benjamin MUniversity of Illinois at Urbana-Champaign2016

    … be extensive. Protease enzymes, which catalyze cleavage of proteins, are essential enzymes for biotechnology. Engineering of natural proteases to change their site of cleavage is an exciting prospect, but this process usually leads to relaxed substrate selectivity, rather than a true change in …

    uiuc Repository record

  5. Studies on vanadium-, palladium-, and copper-catalyzed oxidation and carbon-carbon bond cleavage of organic compounds

    Maeda, Yasunari京都大学 (Kyoto University)2005

    kyoto Repository record

  6. CATALYTIC C-O BOND CLEAVAGE TO SELECTIVELY PRODUCE VALUABLE CHEMICALS FROM BIOMASS-DERIVED FURANIC COMPOUNDS USING NI-BASED CATALYSTS

    ELMIRA SOGHRATI KHORASGANI2018

    … into the role of Ni-based catalysts in C–O bond cleavage of heterocyclic compounds, particularly tetrahydrofurfuryl alcohol (THFA).

    nus Repository record

  7. Intramolecular Triplex Diels-Alder Reaction With Cyclic Dienes Electron Transfer Induced Nitrogen-Oxygen Bond Cleavage Reactions of N-Aryloxypyridinium and N,n'-Dialkoxybipyridinium Salts

    Wolfle, IngridUniversity of Illinois at Urbana-Champaign2014

    U of I Only

    uiuc Repository record

  8. PART I: INVESTIGATION OF ENDOCYCLIC NUCLEOPHILIC SUBSTITUTION AT DI- AND TETRA-COORDINATE SULFUR PART II: SYNTHESIS OF 3-TOSYL-1,2,3-BENZOXATHIAZOLE-2,2-DIOXIDE AND ITS REACTIONS WITH NUCLEOPHILES

    CHUMPRADIT, SUMALEE

    … yielded products arising from ring S-N bond cleavage. Phenyllithium, methyllithium and potassium fluoride gave products from exo S-N bond cleavage. Sodium methoxide yielded products from both exo and endo S-N bond cleavage. An amide synthesis utilizing the cyclic sulfamate as a coupling …

    unh-thes Repository record

  9. Metal Mediated Mechanisms of Drug Release

    Stenton, Benjamin JamesUniversity of Cambridge2018

    … towards the development of bioorthogonal bond-cleavage reactions, and their applications in targeted drug delivery (Figure 1). The first project relates to the development of a palladium mediated bond-cleavage or “decaging” reaction which can cause a propargyl carbamate to decompose and …

    cambridge Repository record

  10. Reactions of Halogenated Ethylenes on the α-Cr₂O₃ (101̅2) Surface

    Minton, Mary AmandaVirginia Tech2006

    … reactions indicating no thermally induced C-C bond cleavage occurs and surface lattice oxygen is not incorporated into surface intermediates. Thermal desorption spectroscopy indicates that in all halogenated ethylene reactions acetylene is the major product, regardless of the reaction scheme. …

    vt Repository record

  11. Structure and reactivity of cyclic imido derivatives of phosphoric acid

    Scaillet, SoniaDepartment of Chemistry1990

    … (25) derivatives showed evidence of cleavage of both imide P-N bonds. This indicates that the ring opening in these derivatives is much slower than the second P-N cleavage in the ring-opened intermediate (30, scheme 11). On the other hand, methanolysis of …

    cape-town Repository record

  12. Understanding MS/MS fragmentation pathways of small molecular weight molecules

    Wright, Patricia AnnUniversity of Greenwich2015

    … of the software. It was hypothesised that the bonds which break during CID of protonated molecules are the bonds which are elongated, and hence weakened, as a result of conformational changes induced by protonation. Bond length changes for a test set of molecules were calculated using quantum …

    greenwich Repository record

  13. Structure Sensitivity of Alkane Hydrogenolysis on Ir/MgAl₂O₄ Catalysts

    Zhang, XiwenVirginia Tech2018

    … the parallel reaction pathway of central C-C bond cleavage is dominant at low temperature or in the low conversion range. As the temperature going up or the conversion increasing at a certain temperature, the parallel reaction pathway of terminal C-C bond cleavage becomes more and more …

    vt Repository record

  14. Flavin Amine Oxidases from the Monoamine Oxidase Structural Family Utilize a Hydride Transfer Mechanism

    Henderson Pozzi, Michelle2011

    … with the N4 nitrogen next to the site of CH bond cleavage being unprotonated. Stopped-flow spectroscopy shows that the pH-dependence of the rate constant for flavin reduction, kred, displays a pKa of 7.3 with a decrease in activity at acidic pH. This is consistent with an uncharged nitrogen …

    tdl Repository record

  15. Model systems for the investigation of metal-support interactions in cobalt based Fischer-Tropsch

    Dyasi, NontsikeleloDepartment of Chemical Engineering2021

    … [3]. The inverse method mimics the interface bond between the support and the active metal, resulting in CoO-Si bond formation. By exposing Co nanoparticles (NPs) to a dilute solution of an alkoxide, tetraethyl orthosilicate (TEOS) or triphnyl ethoxy silane (TPEOS), Co-O-Si bond (ligand) is …

    cape-town Repository record

  16. Vanadium-Catalyzed Aerobic Oxidation of Diols and Lignin Models/Extracts

    Díaz-Urrutia, ChristianUniversité d'Ottawa / University of Ottawa2016

    … different selectivity for C-H, C-O and C-C bond cleavage upon varying of the solvent, the lignin model or the catalyst. Moreover, these catalysts cleave the C-H bond of secondary alcohols through a two-electron oxidation process and the C-C bond cleavage of the oxidation product ketone in …

    ottawa-retro Repository record

  17. Model Chromia Surface Chemistry: C<sub>2</sub> Alkyl Fragment Reactions and Probe Molecule Interactions

    Brooks, John DanielVirginia Tech2010

    … indicating that no thermally induced C-C bond cleavage occurs and surface lattice oxygen is not incorporated into surface intermediates. A combination of photoemission and Auger electron spectroscopies indicates the surface reactions of the chlorinated ethanes proceed via C-Cl bond …

    vt Repository record

  18. Studies Toward A Detailed Understanding Of The Intrinsic Properties Of Nucleic Acid Constituents: Gas-Phase Conformations, Energetics, And Glycosidic Bond Stability

    Wu, Ranran2017

    … RNA. However, it provides an additional hydrogen-bond donor or acceptor, facilitating additional intramolecular hydrogen-bonding interactions to be formed. Therefore, a larger number of low-energy conformers are typically found to be populated in the experiments for the protonated RNA nucleosides …

    wayne-thes Repository record

  19. Exploring new reactions with Organic Electron Donors and the complexities of the Birch reduction

    Chua, JonathanUniversity of Strathclyde2016

    Reductive σ-bond cleavages of challenging substrates under metal-free, mild conditions have recently been achieved with photoactivated super-electron donor (SED). These include (but are not limited to) C-O bonds of benzylic ethers and esters, C-N bonds of benzylic sulfonamides and aromatic amides. …

    strathclyde Repository record

  20. Capture and Characterization of Dioxygen Reactive Intermediates in CYP51 Catalysis

    Jennings, Gareth Kent2017

    … catalyzed by CYPs, unactivated carbon-carbon bond cleavage, is one of particular versatility. Being unique in their catalytic mechanisms, the C-C bond cleaving enzymes and in particular CYP51 from Mycobacterium tuberculosis are though to be capable of utilizing multiple reactive oxygen …

    vcu Repository record

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