Browsing Fakultät für Chemie (inkl. GAUSS) by Referee "Meyer, Franc Prof. Dr."
Now showing items 21-40 of 106
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Bioinspirierte Sauerstoffaktivierung an Bis(benzimidazolyl)basierten Kupfer(I)komplexen und Spektroskopische Studien an Bis(benzoxazolyl) Kupfer(II)-Verbindungen
(2021-05-04)The active sites of type III copper proteins (i.e. tyrosinase) provide inspiration for the development of copper complexes for the activation of O2 as well as for catalytic oxidation and oxygenation reactions of CH substrates. ... -
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 ... -
Proton Coupled Electron Transfer at Heavy Metal Sites
(2021-01-14)Terminal, late transition metal, oxo complexes are pivotal intermediates in oxygenation chemistry. This thesis describes the synthesis and full characterisation of an open-shell terminal oxo complex of iridium from the ... -
N2 Splitting and Functionalization in the Coordination Sphere of Tungsten
(2020-12-02)The splitting and functionalization of N2 remains one of the most challenging reactions in coordination chemistry. In this thesis a series of four isostructural end-on N2 bridged ditungsten-PNP-pincer complexes are synthesized ... -
Mechanistic Investigations of Metal-Metal Cooperativity in Dinickel Complexes and Iron/Cobalt Prussian Blue Analogues
(2020-06-12)This dissertation focuses on two polymetallic systems exhibiting two different phenomena of Metal-Metal Cooperativity in the form of intramolecular C-H(sp2) activation and Charge-Transfer-Induced Spin Transition (CTIST). ... -
Novel Cationic Sulfur Reagents and their Application in Electrophilic Group-Transfer Reactions
(2020-06-08)The two major research achievements of this work are the development of novel sulfur-based electrophilic transfer reagents based on pyridinium, as well as the extension of the reactivity of already established imidazolium ... -
Designing New Heterometallic [2 x 2] Grids using Pyrazolate-bridged Ligands
(2020-02-18)This dissertation focusses on designing new heterometallic [2 x 2] grids based on pyrazolate-bridged ligands exhibiting interesting magnetic and redox properties. To date, numerous homometallic metallogrids have been ... -
From Copper to Gold: Identification and Characterization of Coinage-Metal Ate Complexes by ESI Mass Spectrometry and Gas-Phase Fragmentation Experiments
(2020-01-09)Organocuprates are important reagents with numerous applications in preparative organic chemistry, which has led to extensive investigations regarding their molecular composition. However, while lithium organocuprates have ... -
Rhenium and Osmium PNP Pincer Complexes for Nitrogen Fixation and Nitride Transfer
(2019-12-19)Activation, splitting and fixation of dinitrogen remains one of the most challenging reactions in coordination chemistry. In this thesis, osmium and rhenium complexes based on a PNP pincer ligand are synthesized and ... -
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 ... -
Syntheses of Novel Side-Arm Functionalized N-Heterocyclic Silylene Transition Metal Complexes
(2019-08-30)The main field of silylene chemistry is emerging towards the utilization as strong σ-donating ligands for transition metal complexes. The focus of this area of chemistry was set primarily on the recreation of previous ... -
Synthesis of Terminal Transition Metal Pnictide Complexes by Activation of Small Molecules
(2019-08-13)Coordination compounds involving metal-nitrogen bonds are a well-developed class of organometallic chemistry. In contrast, the chemistry of the heavier analogues of nitrogen, e.g. phosphorus and arsenic is far less explored. ... -
Transient and Stable Terminal Imido Complexes of Iridium
(2019-07-02)In conclusion, it has been demonstrated that the proton coupled oxidation of metal-bound amines and water provide access to a wide range of imido- and oxo-complexes, respectively. The synthetic approach of using strict 1 ... -
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 ... -
Proton-Coupled Electron Transfer at Nickel Pincer Complexes
(2019-05-24)The influence of metal coordination on carbon-centered proton-coupled electron transfer processes is an attractive field of research. Reported literature is limited to thermodynamic investigations and substrate oxidation ... -
Advanced Functionalization of Polyethylene via Catalyzed Chain Growth: Tailored Surfaces and Cationic End-Groups
(2019-03-26)Well-defined, end-functional polyethylene (PE) was synthesized in a catalyzed chain growth (CCG) polymerization and applied in novel synthetic routes for PE modified surfaces as well as in the manufacturing of multifunctional ... -
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 ... -
Cooperative (De-)Hydrogenation of Small Molecules
(2019-01-25)Ammonia borane dehydrocoupling to mainly linear polyaminoborane is reported at room temperature using a bifunctional iron catalyst. Mechanistic studies suggest that both hydrogen release and B−N coupling are metal-catalyzed ... -
Synthesis, Structure and Applications of Cationic Phosphonites
(2018-11-07)Phosphorus based ligands are a hugely important class of ligands for homogenous catalysis, owing to the easy fine-tuneability of their steric and electronic properties. In α-cationic phosphines, the incorporation of a ...