Search for dissertations about: "NHC catalysis"

Showing result 1 - 5 of 6 swedish dissertations containing the words NHC catalysis.

  1. 1. N-Heterocyclic Carbene Catalysis in Organic Synthesis - A Green Chemistry Approach

    University dissertation from ; Chalmers tekniska högskola; Gothenburg

    Author : Linda Ta; [2018]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; aerobic oxidation; ionic liquid; sustainability; NHC catalysis; oxidative NHC catalysis; green chemistry; OTHO; Organocatalysis;

    Abstract : The twelve principles of green chemistry were created as a response to the multiple environmental issues caused by the release of waste from the chemical industry. The principles acts as a guide in the development of sustainable chemical processes for the syntheses of important molecules needed to sustain our living standards. READ MORE

  2. 2. Homogeneous and heterogeneous Cp*Ir(III) catalytic systems : Mechanistic studies of redox processes catalyzed by bifunctional iridium complexes, and synthesis of iridium-functionalized MOFs

    University dissertation from Stockholm : Department of Organic Chemistry, Stockholm University

    Author : Greco González Miera; Stockholms universitet.; [2017]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; catalysis; bifunctional; metal-ligand cooperation; amine alkylation; Hammett; kinetics; acceptorless alcohol dehydrogenation; MOF; transition metal; synchrotron; Organic Chemistry; organisk kemi;

    Abstract : The purpose of this doctoral thesis is to investigate and develop catalytic processes mediated by iridium(III) complexes. By understanding the mechanisms, the weaknesses of the designed catalysts can be identified and be overcome in the following generation. READ MORE

  3. 3. Transition metal-catalyzed reduction of carbonyl compounds Fe, Ru and Rh complexes as powerful hydride mediators

    University dissertation from Stockholm : Department of Organic Chemistry, Stockholm University

    Author : Elina Buitrago; Stockholms universitet.; [2012]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Asymmetric catalysis; amino acid; N-heterocyclic carbene; iron; ruthenium; rhodium; mechanistic investigation; kinetic study; asymmetric transfer hydrogenation; hydrosilylation; Organic Chemistry; organisk kemi;

    Abstract : A detailed mechanistic investigation of the previously reported ruthenium pseudo-dipeptide-catalyzed asymmetric transfer hydrogenation (ATH) of aromatic ketones was performed. It was found that the addition of alkali metals has a large influence on both the reaction rate and the selectivity, and that the rate of the reaction was substantially increased when THF was used as a co-solvent. READ MORE

  4. 4. Aerobic Oxidative N-Heterocyclic Carbene Catalysis via Multistep Electron Transfer - Method Development and Applications

    University dissertation from ; Chalmers tekniska högskola; Gothenburg

    Author : Anton Axelsson; [2017]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; N-heterocyclic carbene; asymmetric synthesis; esterification; glycerol; electron transfer mediator; green chemistry; telescoped reaction; Organocatalysis; aerobic oxidation; dihydropyranone;

    Abstract : Oxidation reactions are ubiquitous in synthetic chemistry, but generally suffer from formation of large amounts of potentially toxic byproducts. Aerial oxygen represents an ideal oxidant since it is inexpensive, non-toxic and only forms water as a byproduct. READ MORE

  5. 5. PEPPSI-type Complexes of Palladium and Platinum: : Investigation of Properties and Applications in Catalysis

    University dissertation from Lund University, Faculty of Science, Department of Chemistry, Centre for Analysis and Synthesis

    Author : Ekaterina Bolbat; Lunds universitet.; Lund University.; [2016-08]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; PEPPSY-type complexes; palladium; platinum; C−H activation; supported homogeneous catalysts;

    Abstract : Catalysis is a powerful tool to highly efficient production of desired newchemicals by acceleration of a chemical reaction rate. Special compounds used forthis purpose are called catalysts; they induce a change in the chemicalenvironment without being consumed during the process. READ MORE