Rare-Earth Supported Nickel Catalysts for Alkyne Semihydrogenation: Chemo- and Regioselectivity Impacted by the Lewis Acidity and Size of the Support
Bianca L. Ramirez, Connie C. Lu
Abstract
) species, and Ni-Sc showed no detectable binding of either substrate. Hence, the mechanism of Ni-catalyzed diphenylacetylene semihydrogenation adheres to two different kinetics: an autotandem pathway (Ni-Ga, Ni-Sc) versus temporally separated tandem reactions (Ni-Y, Ni-Lu, Ni-La). Collectively, the experimental results demonstrate that modulating a base-metal center via a covalently appended Lewis acidic support is viable for promoting selective alkyne semihydrogenation.
Topics & Concepts
DiphenylacetyleneChemistryCatalysisBimetallic stripIsomerizationNickelAlkyneSelectivityLewis acids and basesMedicinal chemistryInorganic chemistryNuclear chemistryOrganic chemistryOrganometallic Complex Synthesis and CatalysisCarbon dioxide utilization in catalysisCatalysis for Biomass Conversion