Sökning: "Substituent effects"
Visar resultat 1 - 5 av 20 avhandlingar innehållade orden Substituent effects.
1. Substituent and solvent effects on 1,3-hydron transfer in the indene system : a study of enantioselectivities, kinetic isotope effects, and catalyst conformations
Sammanfattning : .... LÄS MER
2. Photochemistry of Phenyl Halides
Sammanfattning : We have studied fundamental aspects of photo-induced dissociation kinetics and dynamics in several phenyl halides. By combining femtosecond pump-probe measurements with ab initio calculations we are able to account for several observations. LÄS MER
3. Structure and Dynamics of Core-Excited Species
Sammanfattning : In this thesis we have performed core-electron spectroscopy studies of gas phase molecular systems starting with smaller diatomic, continuing with triatomic and extending our research to more complex polyatomic ones. We can subdivide the results presented here into two categories: the first one focusing on electronic fine structure and effect of the chemical bonds on molecular core-levels and the other one dealing with nuclear dynamics induced by creation of a core hole. LÄS MER
4. Some aspects of the sulfur-oxygen bond in organic sulfur groups : an investigation of substituent effects and bonding by means of correlations with physico-chemical parameters
Sammanfattning : .... LÄS MER
5. Isotopes as Mechanism Spies : Nucleophilic Bimolecular Substitution and Monoamine Oxidase B Catalysed Amine Oxidation Probed with Heavy Atom Kinetic Isotope Effects
Sammanfattning : This thesis concerns the study of reaction mechanisms by means of kinetic isotope effects (KIEs). Studies of the nucleophilic bimolecular substitution (SN2) reaction had the dual purpose of improving our fundamental understanding of molecular reactivity and assessing the ability of kinetic isotope effects to serve as mechanistic tools. LÄS MER