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 7 of 7 for “"Fluorine-substitution"”.
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Hydrogen Bonded Liquid Crystals from Fluorophenols and Alkoxystilbazoles
… and phenols with different degrees of fluorine substitution were prepared. In contrast to the components, the complexes were observed to exhibit nematic and smectic A phases by polarised optical microscopy, and nematic tendency was found to decrease with increasing alkoxy chain length. …
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Metalloid aluminum clusters with fluorine
… organic ligand contains significant amounts of fluorine. The fluorine can, in principle, oxidize the metallic elements, resulting in a system much like organic explosives where the fuel and oxidizer components are mere angstroms apart. We performed density functional theory calculations within …
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A MOLECULAR ORBITAL STUDY OF 5-FLUOROURACIL AND RELATED COMPOUNDS
… to the 5-position of the pyrimidine ring by a fluorine atom is also mechanistically described. A molecular orbital study employing the CNDO/2 approximation was performed on 5-fluorouracil, uracil, and thymine and the results support the mechanisms and chemical effects drawn from the literature …
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Thermochemical properties of fluorinated hydrocarbons, hydroperoxides, and fluorinated hydroperoxides; thermochemistry and kinetics on dissociation and association reactions of oxiranyl radical
… during this work illustrate the effects of fluorine substitution on structures and bonding in C1 to C4 normal hydrocarbons, fluoro-alcohols, fluoro-hydroperoxides based on standard enthalpies of formation and bond dissociation energies. Thermochemical kinetic calculations for the …
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Revisiting aryl N-methylcarbamate acetylcholinesterase inhibitors as potential insecticides to combat the malaria-transmitting mosquito, Anopheles gambiae
… Tanaka to prepare 3-tert-alkylphenols that lack fluorine substitution. This method is competitive with the little known method of Reetz to convert aryl ketones to the corresponding 1,1-dimethylalkyl group and allows one to access electron rich tert-alkyl-substituted aromatics that are not …
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Spektroskopie der Neurotransmitter Tryptamin und Phenylethylamin
… focus is on the study of fluorinated PEA. Fluorine substitution of molecules is a powerful tool in bioorganic and pharmaceutical applications to influence physiochemical and pharmacological properties. The isolated characterization in the gas phase allows to investigate a molecule free of …
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Pyrrolo[2,3-d]pyrimidine Classical Antifolates for Targeted Cancer Chemotherapy- Applications of Bioisosteric and Regioisomeric Substitutions for Improved Tumor-Selectivity and Potency
… of a conformationally restricting intramolecular fluorine hydrogen bond have been described. The dissertation also discusses the synthetic efforts for obtaining the pyrrolo[2,3-<em>d</em>]pyrimidine analogs with regioisomeric substitutions, modified linkers and bioisoteric replacements (general …