Dokumente Fakultät für Chemie (inkl. GAUSS) nach Gutachter "Koszinowski, Konrad Prof. Dr."
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Aerobic Ruthenium-Catalyzed C–H Activations
(2018-08-31)Within the last decades C–H activation processes have evolved from a promising concept to a powerful class of reactions for the construction of organic molecules, especially pharmaceutically active compounds. Within this ... -
Ammonia stabilized Carbanions
(2018-01-17)This thesis examines the solvation of alkali metal cyclopentadienyl derivatives (Cp, CpMe, Cp*, indenyl, fluorenyl) in liquid ammonia as well as in solutions of ammonia in polar aprotic solvents. The degree of solvation ... -
Anthracene Based Colorimetric Molecular Sensors
(2015-02-17)Herein, different synthetic approaches to colorimetric luminescence sensors are presented. 9-Anthraceneamines turned out to be promising colorimetric pH sensors. Their large shift of the emission wavelength upon addition ... -
Barriers of Protonation Reactions of Organometallics
(2023-09-20)Protonation reactions are entirely understood for simple organic and inorganic molecules and there are elaborated concepts to describe such acid-base reactions in both the solution and gas phase. For organometallic species, ... -
Bioinspired dioxygen activation with copper complexes supported by Bis(oxazoline) and Bis(benzimidazole) ligands
(2023-06-20)Many synthetic complexes modeling the oxy form of the tyrosinase have been developed and have shown a preference for either the side-on peroxodicopper(II) (P) or the bis(-oxo)dicopper(III) (O) core depending on the ... -
Bioinspired Iron-Carbene Models of Heme and Non-Heme Enzymes: Electronic Structure and HAA Reactivity
(2022-03-15)The fast depletion of non-renewable energy sources requires modern chemists to develop new industrial processes that are more efficient and environmentally sustainable. In this framework, the functionalization (e.g. ... -
C-H Activation by Nickel and Iron Catalysis
(2019-08-08)The thesis contents methods for the selective activation and functionalization of C–H bonds, among the most abundant bonds in organic molecules. In particular, earth-abundant and cost-effective nickel and iron complexes ... -
C-H Activation for Sustainable Synthesis: Base Metal- and Electro-Catalysis
(2018-08-07)In the recent decades, metal-catalyzed C-H activation greatly expanded the available tools for the sustainable synthesis of bioactive molecules and organic materials. Within this thesis, new synthetic transformations based ... -
C<sub>2</sub>-Symmetric Pyrazole-Bridged Ligands and Their Application in Asymmetric Transition-Metal Catalysis
(2016-06-03)Within the scope of this thesis the synthesis of a plethora of examples of in total three types of C2-symmetric pyrazole-bridged ligand systems (namely PyrBOX, PyrBPyBOX and ProPyrazole) could be established ... -
Characterization of Physical and Chemical Properties of Synthetic Polymer using Ion Mobility-Mass Spectrometry
(2017-12-13)This thesis focuses on developing analytical methodologies based on ion mobility-mass spectrometry (IM-MS) for both physical and chemical properties of synthetic polymer. Beyond numerical experimental data, a comprehensive ... -
Charakterisierung von Intermediaten in Cobalt-vermittelten Reaktionen
(2019-04-03)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 ... -
Constitution and Reactivity of Palladium Ate Complexes in Cross-Coupling Reactions
(2020-02-18)Palladium-catalyzed cross-coupling reactions are among the most widely used tools for the formation of new carbon-carbon or carbon-heteroatom bonds in organic synthesis. Usually, the intermediates involved in the ... -
C–H Activation by Iron(III), Manganese(II) and Rhoda(III)electro Catalysis
(2020-12-15)While major progress was realized with noble transition metal catalysts, the employment of cost-effective and earth-abundant 3d metals has gained significant momentum during the last decade. As stoichiometric amounts of ... -
C–H Activation via Iridium and Rhodium Electrocatalysis and Undirected Electrochemical Fluorination
(2022-06-24)In past decades, transition metal-catalyzed C–H activation has emerged as an increasingly viable toolbox for the step- and atom economic formation of C–C and C–Het bonds. However, oxidative C–H transformations heavily rely ... -
C–H and C–F Activation by Manganese, Nickel and Ruthenium Catalysis
(2021-04-19)The development of novel environment-friendly, step- and atom-economical methodologies is one of the main goals in organic chemistry. In this context, the direct functionalization of inert C–(Het) and C–H bonds has ... -
Development of Photo-Induced C–H Activation by Copper and Ruthenium Catalysis
(2019-11-08)Within recent decades, transition metal-catalyzed C–H activation has become a valuable and versatile tool for organic synthesis. As C–H bonds are ubiquitous in organic molecules, the direct site-selective functionalization ... -
Diagonal and Off-Diagonal Anharmonicity in Hydrogen-Bonded Systems
(2016-05-11)The stretching wavenumber of a functional group exhibits a characteristic shift towards lower energies when serving as a hydrogen bond donor. This well-known effect constitutes an important tool for the study of such ... -
Diversity-Oriented Assembly of C-Glycosides via Late-Stage C−H Glycosylation
(2023-08-29)C-glycosides are widely distributed structural motifs found in natural products and commercially available drug molecules. Due to the stability of glycosidic C-C bonds against chemical and enzymatic hydrolysis, only ... -
Electrochemical C–H Activation by Ruthenium and Palladium Catalysis
(2024-04-19)The emergence of direct functionalizations of C−H bonds offers efficient alternatives to traditional cross-coupling reactions, thereby saving time and costs. However, oxidative C−H activation often depends on stoichiometric ... -
Electrospray-Ionization Mass Spectrometry for the Analysis and Quantification of Carbanions
(2023-03-23)The suitability of ESI-MS for the analysis of carbanions was investigated, including the effects of their basicity, concentration and the experimental conditions. This was followed by exemplary applications, such as live ...