Дисертації з теми "Hydride Transfer Chemistry"
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Razzaghi, Mortezaali. "Quantum Tunneling in Hydride Transfer Reactions in Solution." Thesis, Southern Illinois University at Edwardsville, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1549836.
Повний текст джерелаThe secondary kinetic isotope effects for the hydride transfer reactions from aliphatic alcohols to four carbocations (NAD+ models) in acetonitrile were determined. The results suggest that the hydride transfer takes place by tunneling and that the rehybridizations of both donor and acceptor carbons lag behind the H-tunneling. This is quite contrary to the observations in alcohol dehydrogenases where the importance of enzyme motions in catalysis is manifested.
Wilson, Gleason. "Hydrogen Transfer Reaction Involving Nickel POCOP-Pincer Hydride Complexes." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1447688935.
Повний текст джерелаMa, Li. "Study of the Primary Isotope Dependence of Secondary Kinetic Isotope Effects in Hydride Transfer Reactions in Solution." Thesis, Southern Illinois University at Edwardsville, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10843728.
Повний текст джерелаIt has been accepted that hydrogen-transfer reactions take place through a quantum mechanical tunneling mechanism, where H tunnels through its classical energy barrier in light of its wave form. There are several H-tunneling models proposed, including the contemporary Marcus-like H-tunneling model, which explains that the donor-acceptor distance (DAD) in the tunneling ready state (TRS) is shorter for a heavier isotope (e.g. deuterium (D)) then a lighter isotope (e.g., protium (H)). This model has been used to explain the kinetic isotopic effect observations in H-tunneling processes to provide mechanistic role of protein in enzyme catalysis. The purpose of the research is to test the hypothesis of “isotopically different DAD” concept by studying the hydrogen/deuterium-transfer reactions in solutions, given that hydride-transfer reactions account for over 50% of biological reactions. Our group’s previous results showed that the steric hindrance and hydrogen-bonding effect played a significant role in the different hydrogen vs deuterium tunneling-ready states. In general, the shorter DAD creates more spatial crowding effect which will affect the 2° C-H vibrations and decrease the 2° KIEs. In this thesis, different reaction systems were designed to test these effects by studying the 1° isotope dependence of 2° KIEs at the near and remote positions from the reaction center. It was found that the results are consistent with the hypothesis of the “isotopically different TRS structures”.
Gurevic, Ilya. "Studies on the hydride transfer and other aspects of several thymidylate synthase variants." Diss., University of Iowa, 2018. https://ir.uiowa.edu/etd/6586.
Повний текст джерелаQuaye, Osbourne. "On the Preorganization of the Active Site of Choline Oxidase for Hydride Transfer and Tunneling Mechanism." Digital Archive @ GSU, 2009. http://digitalarchive.gsu.edu/chemistry_diss/46.
Повний текст джерелаDzierlenga, Michael W., and Michael W. Dzierlenga. "The Dynamics of Enzymatic Reactions: A Tale of Two Dehydrogenases." Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/620868.
Повний текст джерелаRinard, Chauncey J. "I. An Unusual Hydride Transfer in the Thermolysis of a Lithium Alkoxide ; II. Carbon-Carbon Bond Forming Reactions of Oxidized Anilide Intermediates. A New Route to Dihydroindoles /." The Ohio State University, 1996. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487935125878439.
Повний текст джерелаYuan, Hongling. "Mechanistic Studies of Two Selected Flavin-Dependent Enzymes: Choline Oxidase and D-Arginine Dehydrogenase." Digital Archive @ GSU, 2011. http://digitalarchive.gsu.edu/chemistry_diss/56.
Повний текст джерелаBorghese, Sophie. "Toward green processes organic synthesis by catalysis with metal-doped solids." Phd thesis, Université de Strasbourg, 2013. http://tel.archives-ouvertes.fr/tel-01017796.
Повний текст джерелаBorghèse, Sophie. "Toward green processes organic synthesis by catalysis with metal-doped solids." Thesis, Strasbourg, 2013. http://www.theses.fr/2013STRAF008/document.
Повний текст джерелаNowadays, the modern chemical industry has to deal with increasing environmental concerns, including the disposal of waste and its economic impact, or the diminution of important worldwide resources such as transition metals. In this Ph.D. thesis, we aimed to bring improvement in this area by the development of green processes, based on the use of recyclable heterogeneous catalysts. By combining the catalytic properties of several metal cations with the properties of solid catalysts such as polyoxometalates or zeolites, we were able to set up new tools for organic synthesis. Silver-doped polyoxometalates proved to be very efficient catalysts in the rearrangement of alkynyloxiranes to furans. Acetals and spiroketals were synthetized by dihydroalkoxylation of alkynediols under catalysis with silver-zeolites. As a perspective, we highlighted the potential applications of such green procedures in the total synthesis of more complex molecules. The first results suggested that these environmental friendly processes should gain increasing interest in the future
Karunaratne, Kalani Udara. "Probing the methylene and hydride transfers in flavin- dependent thymidylate synthase." Diss., University of Iowa, 2018. https://ir.uiowa.edu/etd/6443.
Повний текст джерелаXie, Yun. "Excited-State Hydroxide Ion Transfer From A Model Xanthanol Photobase." Bowling Green State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1430615852.
Повний текст джерелаMembrat, Romain. "Réactions de transfert d'hydrogène catalysées par les complexes de palladium et de platine associés aux ligands phosphinito-acide phosphineux." Electronic Thesis or Diss., Aix-Marseille, 2019. http://theses.univ-amu.fr.lama.univ-amu.fr/190719_MEMBRAT_386crd806cefe861cbrkq829aijwx_TH.pdf.
Повний текст джерелаThe notion of metal catalyzed hydrogen transfer presented in this manuscript relies in generating an active metal hydride from an hydrogen donor (alcohol) and transferring it toward an unsaturated product with a view to molecular complexity increasing. A broad variety of product could be targeted with this concept and its variants. The phosphinito-phosphinous acid ligand which is negatively charged ligand is capable to generate strikingly active palladium and platinum hydride. In the first part of this work, a new anaerobic alcohol oxidation system with remarkable properties of chemioselectivity has been developed. Complementary studies have allowed a good understanding of the hydride transfer mechanism. Moreover it highlighted the interesting ability of the PAP ligand to self adapt its own electronic properties specifically to each steps of the catalytic cycle. In a second stage, a cascade process oxidation - double C(sp3)-N bond activation has been presented. It has been shown that M/PAP complexes could act as a weak Lewis acid. Finally, an enantioselective version of hydride transfer processes has been studied through enantioselective isomerization of allylic alcohols. The effect of the combination of a P - stereogenic ligand and new secondary chirality inductors (central chirality borne by the X-type ligand and inherent chirality borne by a supramolecular C1 symmetric moiety) has been evaluated
Chin, Ami Jun-Yee. "Part A Development of a Fluorescence Resonance Energy Transfer assay or high throughput screening for catalysts in the desymmetrization of meso substrates Part B Application of hydrazide based catalyst in Friedel-Crafts alkylation." Thesis, University of Ottawa (Canada), 2006. http://hdl.handle.net/10393/27118.
Повний текст джерелаEberhart, Michael Scott. "Electron Transfer and Hydride Transfer Reactions of Copper Hydrides." Thesis, 2016. https://doi.org/10.7916/D80K28CW.
Повний текст джерелаSrimannarayana, Malempati. "Topics In Synthetic Methodology : From Heterocycles To Hydride Transfers." Thesis, 2009. http://etd.iisc.ernet.in/handle/2005/1992.
Повний текст джерелаAmbrosini, Vadola Lisa M. "Part I: Development of New Methods for Application in Multicatalytic Reactions Part II: Investigation of Stable Carbenium Catalysts as Hydride Transfer Agents." Thesis, 2011. https://doi.org/10.7916/D8P55VHX.
Повний текст джерела(11197530), Matthew C. Hewitt. "Redox Active Ligands To Facilitate Reactivity From Redox Restricted Metals." Thesis, 2021.
Знайти повний текст джерелаEstes, Deven Paul. "Transition Metal Hydrides that Mediate Catalytic Hydrogen Atom Transfers." Thesis, 2014. https://doi.org/10.7916/D8SF2TDQ.
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