Koordinationsverbindungen basierend auf Azin-, Thiocarbohydrazon- und Carbohydrazon-Liganden : Supramolekulare Netzwerke und diskrete Strukturen

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.