@phdthesis{Goetz2009, author = {G{\"o}tz, Kathrin Claudia}, title = {Bond analysis of metal-element interactions in molecules and solids applying embedding and density functional techniques}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-39373}, school = {Universit{\"a}t W{\"u}rzburg}, year = {2009}, abstract = {Within this thesis, the analysis and hence the better comprehension of the chemical bond within metal-element compounds is the central topic. By use of various DFT methods a selection of M-E interactions have been modeled and analyzed via Bader's QTAIM, the ELF and NBO techniques. Special focus was set on a series of transition metal borylene and carbene complexes, and the Li-C bonds as representatives for main group organometallics. Therefore, this thesis is split into three parts:(I) An introduction reviewing the quantum chemical machinery as well as the analysis tools applied for the evaluation of chemical bonds. (II) Within the second part the chemical interactions taking place in transition metal complexes are studied focusing on borylenes and cognate carbenes. (III) In Part III, a broad overview of the appropriate modeling and nature of the Li-C bond as well as intermolecular interactions in methyllithium is provided.}, subject = {Bindungsanalyse}, language = {en} } @phdthesis{Schinzel2009, author = {Schinzel, Sandra}, title = {Quantum Chemical Investigations of Structure, Bonding and EPR Parameters of Manganese Complexes relevant to Photosystem II}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-35320}, school = {Universit{\"a}t W{\"u}rzburg}, year = {2009}, abstract = {Im Wasser-oxidierenden Cluster („oxygen-evolving complex", OEC) des Photosystem II findet sich die prim{\"a}re Quelle der Sauerstoffproduktion der Erde. Der OEC katalysiert in gr{\"u}nen Pflanzen unter Absorption von Sonnenlicht die Vierelektronen-Oxidation von Wasser zu Sauerstoff in einer zyklischen Sequenz von Oxidationszust{\"a}nden (Kok-Zyklus). In dieser Arbeit wurden Strukturen, Spindichteverteilungen sowie EPR-Parameter ein-, zwei- und vierkerniger Mangankomplexe, die in Bezug auf den OEC modelliert wurden, mit Hilfe der Dichtefunktionaltheorie (DFT) berechnet. Hauptziel war das Verst{\"a}ndnis der molekularen und elektronischen Struktur des vierkernigen Manganclusters des OEC durch direkten Vergleich mit experimentellen EPR-Daten.}, subject = {DFT}, language = {en} }