2026-04-18T03:19:16Zhttps://recercat.cat/oai/request

oai:recercat.cat:2072/3560472024-12-20T17:13:00Zcom_2072_300912com_2072_4427col_2072_301309

Vanadium(V) Catalysts with High Activity for the Coupling of Epoxides and CO2: Characterization of a Putative Catalytic Intermediate Miceli, Claudia Rintjema, Jeroen Martin, Eddy Escudero-Adán, Eduardo C. Zonta, Cristiano Licini, Giulia Kleij, Arjan W. 54 Vanadium(V) complexes derived from aminotriphenolate ligands are demonstrated to be highly active catalysts for the coupling of various terminal and internal epoxides with carbon dioxide to afford a series of substituted organic carbonates in good yields. Intriguingly, a V(V) complex bearing peripheral chloride groups on the ligand framework allowed for the formation and isolation of a rare complex that incorporates a ring-opened epoxide with one of the phenolateO atoms acting as a nucleophile and the metal center as a Lewis acidic site. This unusual structure was characterized by X-ray diffraction and 51V-NMR, and was shown to exhibit catalytic activity for the coupling of propylene oxide and CO2 when combined post-synthetically with these substrates. The results obtained herein clearly show that vanadium complexes in a high oxidation state are powerful catalysts for the activation of challenging internal epoxides, and their conversion into cyclic organic carbonates. 2017-02-16 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion http://hdl.handle.net/2072/356047 https://doi.org/10.1021/acscatal.7b00109 eng L'accés als continguts d'aquest document queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons:http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess 2367 p. application/pdf RECERCAT (Dipòsit de la Recerca de Catalunya)