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Unprecedented NNC-Scorpionate Zirconium-based Bicomponent System for the Very Efficient CO2 Fixation into a Variety of Cyclic Carbonates

dc.contributor.authorFernández-Baeza, Juan
dc.contributor.authorSánchez-Barba, Luis F.
dc.contributor.authorLara-Sánchez, Agustín
dc.contributor.authorSobrino, Sonia
dc.contributor.authorMartínez-Ferrer, Jaime
dc.contributor.authorGarcés, Andrés
dc.contributor.authorNavarro, Marta
dc.contributor.authorRodríguez, Ana M.
dc.identifier.citationInorg. Chem. 2020, 59, 17, 12422–12430es
dc.description.abstractTwo new derivatives of the bis(3,5-dimethylpyrazol-1-yl)methane modified by introduction of organosilyl groups on the central carbon atom, one of which bearing a chiral fragment, have been easily prepared. We verified the potential utility of these compounds through the reaction with [Zr(NMe2)4] for the preparation of novel zirconium complexes in which an ancillary bis(pyrazol-1-yl)methanide acts as a robust monoanionic tridentate scorpionate in a κ3-NNC chelating mode, forming strained four-membered heterometallacycles. These κ3-NNC-scorpionate zirconium amides were investigated as catalysts in combination with tetra-n-butylammonium bromide as cocatalyst for CO2 fixation into five-membered cyclic carbonate products. The study has led to the development of an efficient zirconium-based bicomponent system for the selective cycloaddition reaction of CO2 with epoxides. Kinetics investigations confirmed apparent first-order dependence on the catalyst and cocatalyst concentrations. In addition, this system displays very broad substrate scope, including mono- and disubstituted substrates, as well as the challenging biorenewable terpene derived limonene oxide, under mild and solvent-free
dc.publisherAmerican Chemical Societyes
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.titleUnprecedented NNC-Scorpionate Zirconium-based Bicomponent System for the Very Efficient CO2 Fixation into a Variety of Cyclic Carbonateses
dc.subject.unesco23 Químicaes

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Attribution-NonCommercial-NoDerivatives 4.0 InternacionalExcept where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 Internacional