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Dissertation, RWTH Aachen University, 2022; Aachen : RWTH Aachen University 1 Online-Ressource : Illustrationen, Diagramme (2023). = Dissertation, RWTH Aachen University, 2022, Supramolecular cyclic coordination oligomers developed in the working group are excellent hosts for fullerene guest molecules as C60 and C70. It is therefore interesting to explore, whether other guest compounds of comparable size, such as gold clusters, can be stabilized in these host structures, as well. Therefore, the reaction of cyclic coordination oligomers with different gold compounds, i.e. triphenyl phosphine (TPP) Au(I)-complexes, TPP stabilized Au9- and Au55-clusters was investigated. Surprisingly, it could be observed that the reaction, irrespective of the starting compounds, resulted in the formation of TPP-stabilized Au11-clusters, comprising slight structural variations, but having a cluster core size complementary to the cyclic coordination oligomers cavity. In this dissertation the results and the attempts in understanding these unexpected findings are shown. Various coordination compounds such as dimers, triple and quadruple layer structures are used to investigate the influence of cavities and interactions., Published by RWTH Aachen University, Aachen

The organometallic P2 ligand complex [Cp2Mo2(CO)4(µ,ɳ2:2 P2)] was reacted with monovalent coinage metal (Ag, Cu) salts of weakly coordinating anions and organic, pyridine-based organic linkers to synthesise one-, two- or three-dimensional metal-organometallic-organic coordination polymers. Goal of the experiments was to study the influence of the nature of the linker, the anion, the metal and the crystallisation method, respectively, on the formation of the products. Additionally, two-component-reactions of the Mo2P2 complex and some of the copper(I) and silver(I) salts were performed which yielded different coordination complexes, among them one compound bearing a planar and highly symmetric Cu3P4 motif., Der metallorganische P2-Ligandkomplex [Cp2Mo2(CO)4(µ,ɳ2:2 P2)] wurde mit einwertigen Münzmetallsalzen schwach koordinierender Anionen und auf Pyridin basierenden organischen Linkern umgesetzt um ein-, zwei- oder dreidimensionale metallisch-metallorganisch-organische Koordinationspolymere darzustellen. Ziel dieser Experimente war die Untersuchung hinsichtlich des Einflusses der Art der Linker, der Anionen, des Metalls bzw. der Kristallisationsmethode auf die Ausbildung des Produkts. Zusätzlich wurden Zweikomponentenreaktionen des Mo2P2-Komplexes mit Kupfer(I)- und Silber(I)-Salzen durchgeführt, welche zu verschiedenen Koordinationskomplexen führte, darunter eine Verbindung die ein planares und hochsymmetrisches Cu3P2-Strukturmotif aufweist.

Dissertation, RWTH Aachen University, 2020; Aachen 1 Online-Ressource (XIX, 165 Seiten) : Illustrationen, Diagramme (2020). = Dissertation, RWTH Aachen University, 2020, The present dissertation titled “Coordination compounds based on azine, thiocarbohydrazone and carbohydrazone ligands – supramolecular networks and discrete structures” focuses on the structural investigation of coordination compounds of three different Schiff base ligands with zinc(II) and with zirconium(IV). The main investigation methods used are single crystal structure analysis, nuclear magnetic resonance spectroscopy and ESI mass spectrometry. The synthesis and characterization of a novel pyridine-N-oxide-based azine ligand and the structure of two coordination compounds with known azine ligands and zinc(II) are discussed. In addition, five differently substituted salicylaldehyde-based thiocarbohydrazone ligands are structurally characterized and their coordination compounds with zinc(II)carboxylates in solution and in solid state are investigated. By self-assembly, one- and two-dimensional coordination polymers of different porosity are obtained and a discrete structure is described. In a further study with a tert-butyl-substituted thiocarbohydrazone ligand with zirconium(IV), the resulting zirconium(IV)oxo complex and a decomposition reaction of the ligand are presented. Finally, the synthesis and characterization of a novel pyridine-N-oxide-based carbohydrazone ligand is reported. As a result of the coordination of zinc(II) acetate, the structure of a circular helicate is elucidated. In total, this work contains the discussion of 19 new crystal structures., Published by Aachen