Seltenerd- und Erdalkalimetallkomplexe mit Alkyliden- und Imido-Liganden: Synthese, Derivatisierung und Reaktivität

01/11/2012 to 01/09/2020

Fundamental issues regarding structure and bonding (Fischer- versus Schrock-type carbenes) and, moreover, their relevance as reaction intermediates in olefin metathesis, Fischer-Tropsch processes, and numerous organic functional group transformations are pivotal attributs of transition metal carbene/alkylidene complexes. In the same breath, metal-imido (M=NR) moieties engage in a multitude of chemical transformations and are utilized as ancillaries in transition metal alkylidene complexes to promote stereoselective olefin metathesis and polymerization. The stabilization and isolation of metal-ligand multiple bonds poses an ever ongoing challenge in rare-earth (Ln) and alkaline-earth (Ae) metal chemistry and the existence of long-time elusive alkylidene or imido entities has led to new paradigms in 4f element-ligand bonding as well. This project aims at a fundamental understanding of the formation of such Ln/Ae ligand multiple bonds.