Search for dissertations about: "substitution"

Showing result 1 - 5 of 599 swedish dissertations containing the word substitution.

  1. 1. Experimental Vitreous Substitution

    University dissertation from Lund University, Faculty of Medicine

    Author : Henrik Barth; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; [2018]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Retinal Detachment; Vitreous Body : surgery; Retina cytology metabolism surgery; Retina: Function; Retina: Inflammation; Retinal Detachment; Vitreous Body : surgery; Vitreous substitute; Vitrectomy;

    Abstract : Blixtar. Svarta prickar, spindelben och dimmoln. Rörliga grumlingar framför ögat och liknade symptom drabbar varje dag många svenskar. Oftast är symptomen helt ofarliga men de kan också tyda på begynnande näthinneavlossning, vilket i värsta fall kan leda till blindhet. READ MORE

  2. 2. Palladium-Catalyzed Nucleophilic Substitution of Alcohols Mechanistic Studies and Synthetic Applications

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Supaporn Sawadjoon; Uppsala universitet.; [2013]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; palladium; nucleophilic substitution; mechanism; Organisk kemi; Organic Chemistry;

    Abstract : This thesis deals with the palladium-catalyzed nucleophilic substitution of π-activated alcohols in which the C–O bond of a non-manipulated hydroxyl group is cleaved. The thesis is divided in two chapters describing two different catalytic systems. READ MORE

  3. 3. Platinum(II) and Palladium (II) Complexes with Group 14 and 15 Donor Ligands. Synthesis, Structure and Substitution Mechanisms

    University dissertation from Inorganic Chemistry, Chemical Center, Lund University

    Author : Ola Wendt; Lunds universitet.; Lund University.; [1997]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; mechanism; kinetics; substitution; platinum; palladium; aryl; silyl; nitrile; triphenylstibine; NMR; IR; Raman; X-ray crystallography; stopped-flow; synthesis; Inorganic chemistry; Oorganisk kemi;

    Abstract : The present thesis deals with Pd(II) and Pt(II) complexes with group 14 and 15 donor ligands. Such complexes have been prepared and investigated mainly with regard to their ground state structures and the mechanism according to which they undergo substitution. READ MORE

  4. 4. Ligand Substitution and Solvent : Exchange Reactions of Palladium(II) and Platinum(II) Acetonitrile and Dimethyl Sulfoxide Complexes. A High-Pressure Stopped-Flow and NMR Study

    University dissertation from Lunds universitet

    Author : Björn Hellquist; Högskolan i Jönköping.; [1988]
    Keywords : ;

    Abstract : .... READ MORE

  5. 5. Concerted or Stepwise? β-Elimination, Nucleophilic Substitution, Copper Catalysed Aziridination and Ruthenium Catalysed Transfer Hydrogenation Studied by Kinetic Isotope Effects and Linear Free-Energy Relationships

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Per Ryberg; Uppsala universitet.; [2002]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; Kinetic isotope effect; linear free energy relationship; elimination; substitution; aziridination; transfer hydrogenation; Organisk kemi; NATURAL SCIENCES Chemistry Organic chemistry; NATURVETENSKAP Kemi Organisk kemi; organisk kemi; Organic Chemistry;

    Abstract : This thesis describes the use of kinetic isotope effects, linear free energy relationships and stereochamical studies to distinguish between different mechanistic alternatives and to obtain information about transition state structure.In the first part fluorine and deuterium kinetic isotope effects were determined for the base promoted HF elimination from 4-fluoro-4-(4’-nitrophenyl)butane-2-on. READ MORE