Browsing Fakultät für Chemie (inkl. GAUSS) by Title
Now showing items 111-130 of 758
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Conformational spectroscopy of flexible chain molecules near the folding limit
(2018-02-22)The highly competitive conformational landscapes of flexible chain molecules are a difficult challenge even for modern quantum chemistry as several delicate effects, partially counterbalancing each other, play an important ... -
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 ... -
Construction of Low‐Symmetric and Light-Switchable Coordination Cages for Guest Uptake and Catalysis
(2016-07-04)An investigation into the self-assembly and the host-guest chemistry of PdII-based metal-organic architectures was presented in this dissertation.In Chapter 2, the formation of an inclusion complex of ...
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Control over assembly and interpenetration of Pd-based coordination cages
(2017-03-27)In the first part, a thermordynamically stable monomeric cage was obtained and the transformation from the monomeric cage to dimeric cage and even to a triple catenane was realized by varying the amount of halide anions. ... -
Controlled folding and conformational switching in metal-mediated DNA constructs
(2017-02-28)The work here presented explores DNA as a potential tool for supramolecular nanoconstructs, controlled self-assembly and the easy synthesis and manipulation of the DNA. Besides this, the introduction of chemical modifications ... -
Controlled radical polymerization at pressures up to 2000 bar
(2001-07-26)High-pressure controlled polymerizations of styrene and of butyl acrylate were successfully performed using different nitroxides as mediator. Narrow polydispersities and molecular weights ... -
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 ... -
Cooperative Activation of Small Molecules on Preorganized Dinuclear Cobalt Complexes
(2025-03-14)The coordination chemistry of late-transition-metal dinitrogen complexes remains a topic of considerable interest. In this study, a pyrazolate-based dinucleating nacnac ligand was employed to construct a series of bimetallic ... -
Crystal Structure of Wind, a PDI-Related Protein Required for Drosophila melanogaster Dorsal-Ventral Development
(2003-11-17)Wind is a key factor to trigger dorsal-ventral patterning in the Drosophila embryo development. Genetic experiments indicate that Wind is required for targeting the dorsal-ventral ... -
Crystal Structures of a Bacterial Isocitrate Dehydrogenase and the Human Sulfamidase
(2015-01-09)In an X-ray crystallographic experiment, intensities and directions of X-rays scattered by electrons in a crystal are measured. However, the relative phase information in the interference pattern is lost. If we knew the ... -
Crystallographic and modeling studies of intermolecular interactions of biological interest
(2004-06-07)Three projects were investigated in the current thesis. In the first part, the binding of the anticancer drug 7-Aminoactinomycin-D to the non-complementary DNA 5'-TTAGBrUT-3' has been studied ... -
Crystallographic studies on DNA in complex with antibiotics and effects of anisotropic scaling on structure solution
(2008-12-01)This work investigates the structure of complexes between DNA and antibiotics discussing the crystal structures of d(AACCGGTT)-trioxacarcin, d(CGTACG)-trioxacarcin and d(ACGTACGT)-echinomycin. ... -
Crystallographic studies on Echinomycin bisintercalation on DNA and an alternating D-alanyl,L-homoalanyl PNA.
(2005-12-09)SUMMARYStructures of echinomycin in complex with double stranded DNAs. The structure of complexes between the antibiotic echinomycin and different short DNA duplexes have been ... -
Cu- and Fe-mediated Atom-Transfer Radical Polymerization in Aqueous Solution
(2016-08-01)The mechanism and the kinetics of metal-catalyzed radical polymerization were investigated by spectroscopic methods and by PREDICI® simulation. A particular focus was on Cu- and Fe-mediated atom-transfer radical polymerization ... -
Cyclisierungsreaktionen mehrfach ungesättigter Systeme - Theorie und Experiment
(2002-07-29)This work brings some order to the great variety of the "cyclizations of polyunsaturated systems". In a first theoretical part, it is shown by means of computational chemistry that a big ... -
Cyclopentadienyl Free Compounds of p, d, and f Elements
(2003-07-10)One of the main objectives of this dissertation was to establish a general route to the Cp-free bis-hydrocarbyl complexes for the 4f metals, LLnR2. Taking into account both the Lewis acidic nature of the lanthanide cations ... -
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 by Ruthenium(II), Cobalt(III) and Manganese(I) Catalysis
(2017-07-07)C–H functionalizations have expanded the toolbox of organic chemistry and found widespread applications in the synthesis of complex and bioactive molecules. Within this thesis, several new synthetic transformations by ... -
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 ...