Dokumente Fakultät für Chemie (inkl. GAUSS) nach Titel
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N2 Fixation by Chromium and Rhenium PNP Pincer Complexes
(2022-03-16)This thesis focusses on the activation and functionalization of atmospheric dinitrogen by chromium and rhenium based transition metal complexes. The electronic structure of dinitrogen bridged key species is discussed based ... -
N2 Splitting and Functionalization in the Coordination Sphere of Rhenium
(2017-01-12)The first example of homogeneous N2 splitting mediated by rhenium as group 7 transition metal is reported and represents rare complete scission of the N-N bond in well-defined terminal nitrido complexes. These could be ... -
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 ... -
Nafisamycin, Cyclisation Product of a New Enediyne Precursor, Highly Cytotoxic Mansouramycins, Karamomycins Possessing a Novel Heterocyclic Skeleton and Further Unusual Secondary Metabolites from Terrestrial and Marine Bacteria.
(2009-03-19)The search for new medically active compounds to overcome the countless diseases is one of the most relevant objectives worldwide. Medicinal plants were used previously in the traditional ... -
Nano-Carrier Synthesis via Z-RAFT Star Polymerisation
(2012-11-21)In this project the establishment of nano-scaled and monomolecular objects working as carrier system was investigated. Such nano-carriers find application in drug delivery, catalysis or as templates for hybrid nanomaterials. ... -
Nanotechnologie im Kontext einer Bildung für nachhaltige Entwicklung: Vom Konzept zur curricularen Innovation für den Chemieunterricht
(2019-08-02)With the growing number of challenges that humankind is currently facing, the need for diverse solutions and possible courses of action is increasing. Two elements are necessary for sustainable development in the economy, ... -
Neuartige Pyrrol/Pyrazol-Bausteine für die Synthese von Hybrid-Makrozyklen, azyklischen Ligandsystemen und bimetallischen Komplexen
(2007-11-30)The present work focussed on the synthesis of a versatile pyrrole-pyrazole key building block (3,5-bis-(3,4-diethyl-1-formylpyrrol-2-ylmethyl)-1H-pyrazol), and its application in the synthesis ... -
Neue Biofilminhibitoren mittels Metagenom-Strategie und marine Streptomyceten, neue Naturstoffe, Synthesen und Biosynthesen
(2010-11-22)This thesis is divided in four separate sections. The first part deals with the synthesis and chemical analysis of novel biofilm inhibitors as a part of a joint research project for the ... -
Neue kovalent und ionogen aufgebaute Alkinylderivate mit Elementen der 13. Gruppe des Periodensystems
(2003-04-23)In spite of their synthetic use in organic chemistry, only a few alkynyl derivatives of group 13 metals are known in the literature and a very few of them are structurally characterized.In ... -
Neue unsymmetrische Pyridazin-verbrückte Pyrazol/NHC-Hybridliganden als Gerüste für multinukleare Übergangsmetallkomplexe – erste Anwendungen in der Katalyse
(2013-01-24)The synthesis and characterization of pyridazine-bridged NHC/pyrazole ligands providing an NHC as organometallic and a classical N-donor compartment is described. These ligands serve as versatile scaffolds for a variety ... -
Neue Übergangsmetall-vermittelte Reaktionen zum effizienten Aufbau cyclopropanhaltiger Oligocyclen
(2004-10-20)The objective of this thesis is the development of new transition metal-mediated reactions for the construction of cyclopropanated oligocycles. In the first part of the thesis, the ... -
Neural Network Potential Simulations of Copper Supported on Zinc Oxide Surfaces
(2021-09-28)Heterogeneous catalysis is an area of active research, because many industrially relevant reactions involve gaseous reactants and are accelerated by solid phase catalysts. In recent years, activity in the field has become ... -
New and Bioactive Secondary Metabolites from Ma-rine and Terrestrial Bacteria: Ramthacin A, B, C, and Polyene Macrolides from Genetically Modified Bacteria
(2009-01-09)Natural products have provided the major sources of chemical diversity for phar-maceutical discoveries for many decades. For clinical application to treat human dis-eases in almost all ... -
New Applications of Methyl 2-Chloro-2-cyclopropylideneacetate Towards the Synthesis of Biologically Important Heterocycles
(2005-09-23)The work in this thesis starts with the advanced synthesis of methyl 2-chloro- and 2-bromo-2-cyclopropyledeneacetate (4-Me and 5). The cyclopropanol derivative (31) obtained by Kulinkovich ... -
New Applications of the Invariom Database
(2017-03-29)Three new applications of the Invariom database have been developed and discussed. All applications are in the field of chemical crystallography or molecular modeling. As prerequisite, the invariom database itself ... -
New Biomimetic Analogues of Functional [2Fe-2S] Proteins
(2008-11-27)Iron-sulfur proteins are ubiquitous natural cofactors of prime importance in biological systems. While electron transfer is regarded as their main role, iron-sulfur clusters also feature ... -
New Derivatives and Iron Complexes of the Siamese-Twin Porphyrin
(2017-02-14)Variation of the substitution pattern of the Siamese-twin porphyrin (STP), an expanded porphyrin incorporating two pyrazole moieties, identified a set of substituents that result in an optimized preparation of highly ... -
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 ... -
New Methods for the Syntheses of Amido, Imido, Nitrido and Dinitrogen Metal Complexes and Organometallic Hydrides and Oxides
(2002-04-08)New methods for the preparations of nitrogen- and oxygen-containing early transition metal compounds and imido-ansa-metal hydrides, which are difficult to achieve by other methods, have ...