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 10 of 10 for “"homolytic cleavage"”.
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Studies of Reaction Mechanisms Requiring Low Molecular Weight Thiol Cofactors
… that this reaction is a thiyl radical promoted homolytic cleavage of the cobalt-carbon bond rather than the nucleophilic attack by thiolate anion which has been pro
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Transformation of biomass to value-added chemicals through non-thermal plasma
… of the NTP pretreated cellulose showed that homolytic cleavage of glycosidic bonds occur during the NTP treatment. The resulting free radicals with relative long lifetime were trapped within the cellulose structure, allowing subsequent pyrolysis of the NTP-pretreated cellulose to proceed …
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Investigations into cyclopropanation and ethylene polymerization via salicylaldiminato copper (II) complexes
… very unlikely. Copper-carbon bonds decompose by homolytic cleavage or C-H activation. Copper-alkyls and –aryls readily decompose into brown colored oils and salts with different colors. Ligand transfer to trimethylaluminum (TMA) appears to explain low yield ethylene polymerization.
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Crystallization studies of 5'-deoxyadenosyl radical enzymes
… the 5'-deoxyadenosyl radical is generated by homolytic cleavage of the carbon-cobalt bond of adenosylcobalamin. In the case of S-adenosylmethionine-dependent radical enzymes, the 5'-deoxyadenosyl radical is generated by reductive cleavage of the S-adenosylmethionine following injection of an …
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Theoretical exploration of char formation during lignin pyrolysis
… functionalities exhibit high resistance to homolytic cleavage and are more thermally stable.<br/><br/>In Chapter 3, we propose a reaction mechanism for the formation of aromatic char clusters from the products of lignin decomposition. Here, through investigation of sixteen parallel pathways, …
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Investigation of a novel intein-based Escherichia coli expression system for human methylmalonyl CoA mutase : a thesis presented to Massey University in partial fulfilment of the requirements for the degree of Master of Science in Biochemistry
… (AdoCbl). The mechanism of catalysis involves homolytic cleavage of AdoCbl's unusual C-Co bond, to generate radicals. Dysfunctional hMCM results in the rare, potentially fatal metabolic disorder methylmalonic acidemia. An experimentally determined structure of hMCM would add to the …
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Generation of Alkyl Radicals Via C-H Functionalization and Halogen Atom Transfer Processes
… way to form such alkyl radicals is the direct homolytic cleavage of C-X bonds. In past decades, photoredox catalysis has emerged as a powerful and greener tool for the synthesis of radicals under mild reaction conditions, which has brought tremendous attention. Although remarkable success has …
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Thermal Decomposition Mechanisms of Per- and Polyfluoroalkyl Substances and Application to Analysis of Total Organofluorine
… mechanisms of PFASs were identified, including cleavage of intramolecular bonds through transition states, direct homolytic cleavage, radical reactions, hydrolysis, and oxidation. Mineralization tends to occur above 700 °C in oxidizing atmospheres and at lower temperatures in inert atmospheres, …
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Approaching magnetic field effects in biology using the radical pair mechanism
… data for the cage radical pairs formed by the homolytic cleavage of Co-C bonds in several coenzyme B12 dependent enzymes to calculate effects of earth-strength steady and oscillating magnetic fields on their singlet-to-triplet yields via the radical pair mechanism (see [7] or Chapter 6). Energy …
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A Radical Approach to Photochemical Transformations Using Earth-Abundant Metals
… single electron transfer (ISET) to promote the homolytic cleavage of this metal-ligand bond and generate an open-shell radical, which can bypass the OSET redox-potential matching prerequisite. Light-induced ligand-to-metal charge transfer (LMCT) is such reaction manifold, allowing for selective …