Browsing Fakultät für Chemie (inkl. GAUSS) by Referee "Siewert, Inke Prof. Dr."
Now showing items 21-31 of 31
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Transformations of Energy-Related Small Molecules at Dinuclear Complexes
(2021-02-05)The urgent need for the development of carbon-neutral energy conversion schemes has inspired chemists worldwide to investigate catalytic water splitting using sunlight as the energy source. A key component for the preparation ... -
Studies Toward Selenium-pi-Acid Catalyzed Oxidative Functionalizations of Olefinic and Acetylenic Multiple Bonds
(2020-09-24)The focus of this thesis was the oxidative functionalization of alkenes via selenium-pi-acid catalysis. In the realm of dual photoredox/selenium-pi-acid catalysis, the known methodology was expanded to the use of alcohols ... -
Entwicklung regio- und enantioselektiver Transformationen an Alkenen mittels λ3-Iodan-Reagenzien bzw. chiraler Selen-π-Säure-Katalysatoren
(2020-09-02)In this thesis three novel oxidative functionalisations of alkenes are presented. The focus lay on the one hand on the development of the first aerobic phosphatation of alkens using a dual selenium-pi-acid-photoredox ... -
Dinuclear Copper and Nickel Complexes of New Multidentate N-heterocyclic Carbene Ligands: Structures, Dynamics and Reactivity
(2019-12-18)The present Ph.D. thesis is divided in two parts and describes N-heterocyclic carbene complexes of copper and nickel, their structures, dynamics in solution and reaction patterns. Part I deals thematically with copper(I) ... -
Dinickel Complexes of the "Two-In-One" Pincer scaffold
(2019-11-11)Bringing two metal ions in close proximity offers interesting perspectives for cooperative activation and catalytic transformation of substrates. Ditopic pyrazolate-based bridging ligands are known to represent valuable ... -
Organoferrate als Intermediate in Eisen-Katalysierten Kreuzkupplungsreaktionen
(2019-05-24)In the context of this work a combination of ESI mass spectrometry, mößbauer spectroscopy and electrical conductometry was used to identify and characterize a large number of organoferrates. These anionic species, which ... -
Reductive Activation of Nitric Oxide and Nitrosobenzene at a Dinickel(II) Dihydride Complex and New Pyrazole-Based Diiron Compounds
(2019-02-15)This thesis work deals with the reactivity studies of a pyrazole-based dinuclear nickel(II) dihydride complex towards small molecules, in particular nitric oxide and nitrosobenzene. The obtained products were characterized ... -
New Methodologies for the Regio- and Stereoselective Electrophilic Cyanation of Alkynes
(2019-01-04)The ability of sulfur imidazolium thiocyanates salts to serve as a remarkable source of cyano groups was tested, thus efficiently promoting cyanations of internal and terminal alkynes. The methods described are performed ... -
Nitric Oxide Reactivity and Unusual Redox Properties of Biomimetic Iron-Sulfur Clusters with Alternative Cluster Ligands
(2018-05-02)This work describes the nitrosylation of biomimetic [2Fe–2S] clusters with phenylbis(benzimidazol-2-yl)methane or benzimidazolthiophenol ligands in different iron oxidation states and ligand protonation states. Mixed-valent ... -
Electronic Structure and Reactivity of Bioinspired Organometallic Iron Complexes Relevant to Small Molecule Activation
(2017-06-15)This PhD thesis focuses on the development and characterization of new organometallic iron complexes as models for abundant enzymatic systems. The use of a macrocyclic tetracarbene ligand system results in novel features ... -
Estimating Molecular Weights of Organometallics in Solution with Diffusion NMR Techniques
(2017-03-31)This PhD thesis focuses on diffusion NMR spectroscopy and the utilisation of the external calibration curve (ECC) diffusion-ordered spectroscopy (DOSY) technique on the estimation of molecular weights of organometallic ...