“Canopy Catalysts” for Alkyne Metathesis: Molybdenum Alkylidyne Complexes with a Tripodal Ligand Framework
Julius Hillenbrand, Markus Leutzsch, Ektoras Yiannakas, Christopher P. Gordon, Christian Wille, Nils Nöthling, Christophe Copéret, Alois Fürstner
Abstract
Mo NMR spectroscopy; this analytical tool had been rarely used in organometallic chemistry before but turns out to be a sensitive probe that deserves more attention. The data show that the podand ligands render a Mo-alkylidyne a priori more electrophilic than analogous monodentate triarylsilanols; proper ligand tuning, however, allows the Lewis acidity as well as the steric demand about the central atom to be adjusted to the point that excellent performance of the catalyst is ensured.
Topics & Concepts
ChemistryLigand (biochemistry)ElectrophileAlkyneSteric effectsCatalysisMetathesisCombinatorial chemistryStereochemistryOrganic chemistryReceptorPolymerBiochemistryPolymerizationSynthetic Organic Chemistry MethodsOrganometallic Complex Synthesis and CatalysisCatalytic Alkyne Reactions