Dokumente Fakultät für Chemie (inkl. GAUSS) nach Titel
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S-Substituted Dibenzothiophenium Triflates: Synthesis, Structure and Reactivity
(2021-04-23)The content of this thesis focused on the general syntheses and applications S-substituted alkynyl-, alkenyl- and aryldibenzothiophenium triflates. Addition reactions have been performed from S-alkynyldibenzothiophenium ... -
S2 State Photodissociation of Diphenylcyclopropenone, Vibrational Energy Transfer along Aliphatic Chains, and Energy Calculations of Noble Gas-Halide Clusters
(2014-06-10)In this work, three major topics are investigated. The decarbonylation of diphenylcyclopropenone from its second excited electronic state forms the first part. This reaction was investigated using pump laser pulses of ... -
Scattering of vibrationally excited NO from vanadium dioxide
(2020-01-24)This work investigates the surface dynamics of vanadium dioxide with nitric oxide in dependence of its metal-to-insulator transition (MIT) at 68 °C. At lower temperatures VO2 has a monoclinic lattice structure which has ... -
Schwingungsdynamik in O−H···O-verbrückten Aggregaten: FTIR-Spektroskopie vom Nah- bis zum Ferninfraroten
(2015-10-13)This work focuses on the vibrational dynamics of molecular clusters featuring intermolecular O–H···O hydrogen bonds. For this purpose the clusters are generated in supersonic jet expansions and probed via FTIR spectroscopy ... -
Schwingungsspektroskopie nah- und überkritischer Lösungsmittel
(2013-07-29)Expansions of compressed fluids find wide application. Here, they are characterized via vibrational spectroscopy. The focus is on the phase state of particles emerging from flash atomization of compressed liquids. As a ... -
Schwingungsspektroskopische Untersuchung der Aggregation und Isomerisierung von Modellpeptiden in der Jet-Expansion am Beispiel kleiner sekundärer Amide
(2021-08-06)Small secondary amides serve as simple and yet realistic model systems for hydrogen bonds in peptides and the rotational isomerization about the actual peptide bond. The preferred structures of small amide clusters (e. ... -
Schwingungsspektroskopische Untersuchungen der Wasserstoffbrückendynamik in Alkohol-α-Hydroxyester-Komplexen aus topologischer und chiraler Perspektive
(2024-04-26)The success of an organocatalytic reaction in which the bond between substrate and catalyst is non-covalent, e.g. in the form of a hydrogen bond, is determined by the topology of the hydrogen bond in the prereactive complex. ... -
Schwingungsspektroskopische Untersuchungen zur Chiralitätserkennung und Torsionsdynamik bei Alkoholen
(2020-10-20)In this thesis different implications of molecular chirality are explored by experimental and quantum chemical methods. Discriminating interactions between molecules of different handedness, termed chirality recognition, ... -
Searching for more π-acceptor phosphines: From α-pyridiniophosphines to α-cationic phospholes
(2022-04-07)This thesis focuses on two classes of cationic phosphines. In the first part, the previously developed cationic pyridinio-phosphines were investigated further in respect to their coordination chemistry towards Ir and their ... -
Segregation von Wasserstoff und Deuterium an Versetzungen in Palladium
(2000-12-13)Small angle neutron scattering (SANS) measurements on Pd samples containing dislocations with a high dislocation density reveal an additional intensity for a scattering vector of 0.02 to ... -
Sekundärstoffe aus endophytischen Pilzen mariner Habitate und Abbaureaktionen an Simocyclinon D8
(2008-01-09)This thesis deals with the isolation, characterization und chemical derivatization of natural products. Most of the described metabolites show a high potential biological activity which is ... -
Selective C-H Activation: Ruthenaelectro-Catalysis and Carborane Cage Activation
(2021-10-05)Synthetic organic chemistry mainly focuses on the cleavage and formation of bonds in a practical and selective fashion, where the formation of carbon-carbon (C-C) and C-Heteroatom (C Het) bonds constitutes one of the most ... -
Selective C–H Activation by Ruthenium(II) Carboxylate and Nickelaelectro-Catalysis
(2021-01-28)This doctoral thesis was divided into two main parts. In the first part, ruthenium(II)-catalyzed ortho-C–H alkynylations of diverse benzoic acids were achieved for the synthesis of aromatic alkynes. And meta-C–H activations, ... -
Selectivity Control in 3d Transition Metal-Catalyzed C–H Activation
(2019-08-23)Methods for the selective functionalization of otherwise inert C–H bonds have been recognized as a transformative tool in synthetic organic chemistry, with applications ranging from the synthesis of complex bioactive ... -
Selektive Halogenierungen unter Phasentransferbedingungen: Mechanistische Untersuchungen und Synthetische Anwendungen
(2001-08-01)The present thesis deals with a new selective method for halogenation (Cl, Br,I) of organic compounds in multiphase systems. Systematic variations of the reaction conditions led to strong ... -
Self-Organization of β-Peptide Nucleic Acid Helices for Membrane Scaffolding
(2019-08-06)In a vast number of cellular processes interactions between membranes and proteins are essential, resulting in the lipid bilayer being interspersed immensely with proteins. Apart from catalytic or signaling functions, a ... -
Sesquiterpen-Analoga aus b-Dimethyamino-substituierten a,b-ungasättigten Fischer-Carbenkomplexen
(2004-04-26)Alkines undergo in Pyridine as a solvent one formal [3 + 2]-addition with aminocarben-Complexes and gives protected high reactive cyclopentadienones, which can be used for building of ... -
Silylhydrazine und -hydrazone
(2001-11-07)This thesis is concerned with the silicon chemistry of hydrazine (H2N-NH2) and hydrazone (H2N-N=CR2). Mono-, bis-, tris-, tetrakis(silyl)hydrazines and bis(hydrazino)silanes as well as ... -
Site-Selectivity in Ruthenium-Catalyzed C–H and C–C Activations
(2020-09-23)During the past decades, transition metal-catalyzed C–H and C–C activation has been recognized as a powerful platform in organic synthesis to access the selective construction of new C–C and C–Het bonds. The full control ... -
Small Molecule Activation of Copper and Iron Complexes with Bis(oxazoline) Ligands
(2017-09-22)This work describes small molecule activation by copper and iron complexes with structurally and electronically modified bis(oxazoline) (BOX) ligand systems, focusing on dioxygen and nitric oxide as substrates. Dioxygen ...