Sökning: "Fluorination"

Hittade 5 uppsatser innehållade ordet Fluorination.

  1. 1. Trifluoromethoxylation of Allylic Alcohols via 1,2-Aryl Migration Promoted by Visible Light-Mediated Photoredox Catalysis

    Uppsats för yrkesexamina på grundnivå, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Shuai Qiu; [2020]
    Nyckelord :Photoredox Catalysis; Fluorination; Trifluoromethoxylation; tvisible light; allylic alcohols; fotoredoxkatalys; trifluorometoxylering; synligt ljus; allyliska alkoholer;

    Sammanfattning : Visible light photoredox catalysis has proven to be a powerful tool for promoting transformations in organic synthesis. Hence this project was carried out to develop tools for predicting reactivity patterns of visible light- promoted redox reactions. Fluorination is of immense importance in organic chemistry, and so is trifluoromethoxylation. LÄS MER

  3. 2. Iron and Oxygen Isotope Signatures of Magnetite in Iron Ore of Kiruna Type

    Master-uppsats, Uppsala universitet/Mineralogi, petrologi och tektonik

    Författare :Malin Andersson; [2020]
    Nyckelord :IOA-deposits; magnetite; SIMS; EBSD; Fe- and O isotopes; laser fluorination;

    Sammanfattning : Stable isotope analysis of iron and oxygen isotopes in magnetite of Kiruna-type from Sweden and Chile have been conducted to further the understanding of the formation, and advance the analysis methods of these deposits. For this, data from SIMS (secondary ion mass spectroscopy), EBSD (electron backscatter diffraction) and triple oxygen analysis (by laser fluorination) are used. LÄS MER

  4. 3. SYNTHESIS OF β-D-RIBOPYRANOSIDES DERIVATIVES FROM β-D-XYLOPYRANOSIDE

    Master-uppsats, Lunds universitet/Kemiska institutionen

    Författare :Christopher Musonda; [2018]
    Nyckelord :organic chemistry; organisk kemi; xylos; träsocker; proteoglykan; Chemistry;

    Sammanfattning : The aim of this thesis was to synthesize various β-D-ribopyranoside derivatives with different C-4 functional groups, using D-xylose as the starting material. The desired modifications were deoxygenation, fluorination, methylation and epimerization of the C-4 hydroxyl group. LÄS MER

  5. 4. Towards the synthesis of a fluorinated diphosphine compound for the study of C-F activation

    Master-uppsats, Lunds universitet/Kemiska institutionen

    Författare :Amita Jahangiri; [2012]
    Nyckelord :Organisk kemi; Chemistry;

    Sammanfattning : The Wendt group at LU has recently developed a new class of sp3 pincer type ligands through the selective C-H bond activation which introduced a rare example of PC(sp3)P pincer Pd(II) complex. In the present study, we aim to obtain insight into the selective cleavage of the sp3 C-F bond by insertion of iridium metal. LÄS MER

  7. 5. Probing the Toba super-eruption: Insights from oxygen isotope geochemistry and geobarometry

    Master-uppsats, Berggrundsgeologi

    Författare :David Budd; [2011]
    Nyckelord :super-eruption; oxygen isotopes; geobarometry; Toba; magmatic plumbing; caldera;

    Sammanfattning : The Toba caldera located in north Sumatra, Indonesia, is the source of the largest volcanic eruption in the Quaternary (Rose & Chesner 1987). Its enormous volume of 2800 km3 has been a matter of debate for decades and it is still unclear where and how the Toba magma was assembled. LÄS MER