Charakterisierung von Intermediaten in Cobalt-vermittelten Reaktionen
Characterization of Intermediates in Cobalt-Mediated Reactions
von Friedrich Kreyenschmidt
Datum der mündl. Prüfung:2019-01-22
Erschienen:2019-04-03
Betreuer:Prof. Dr. Konrad Koszinowski
Gutachter:Prof. Dr. Konrad Koszinowski
Gutachter:Prof. Dr. Lutz Ackermann
Dateien
Name:Friedrich Kreyenschmidt-eDiss.pdf
Size:4.54Mb
Format:PDF
Zusammenfassung
Englisch
Homogeneous catalysis is from outstanding importance for modern chemical synthesis. In addition to palladium- and nickel-based catalyst systems, which are well established for a long time, also cobalt-based catalysts are known to mediate challenging conversions. The mechanistic details of the letter reactions are not understood in detail till now. In this work electrospray-ionization mass spectrometry is used to detect the elusive intermediates in cobalt-catalyzed cross-coupling, C-H-activation, hydrogenation and polymerization reactions to get insight into the relevant mechanistic processes. Gas-phase fragmentation reactions are used to reveal the unimolecular reactivity of the key intermediates.
Keywords: homogeneous catalysis; analytical chemistry; mass spectrometry