1. Bis(phenolate)-functionalized N-heterocyclic carbene complexes of oxo- and imido-vanadium(V)
- Author
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Jone Finnstad, Erwan Le Roux, Karl W. Törnroos, and Lakshmi Suresh
- Subjects
Cyclohexene ,Vanadium ,chemistry.chemical_element ,010402 general chemistry ,01 natural sciences ,Medicinal chemistry ,Catalysis ,Bærekraftig katalyse ,Inorganic Chemistry ,chemistry.chemical_compound ,Materials Chemistry ,Polymerisation ,Reactivity (chemistry) ,Physical and Theoretical Chemistry ,Inorganic chemistry: 442 [VDP] ,Utnyttelse av CO2 ,010405 organic chemistry ,Ligand ,Utilization of CO2 ,Cycloaddition ,0104 chemical sciences ,Uorganisk kjemi: 442 [VDP] ,Sustainable catalysis ,chemistry ,Carbene ,Cyclohexene oxide - Abstract
Oxo- and imido-vanadium(V) metal complexes supported by bis(phenolate)-functionalized N-heterocyclic carbene (NHC) ligands were synthesized and structurally identified. In the presence of [(Ph3P=)2N]Cl ([PPN]Cl), saturated NHC oxo-vanadium complexes showed activity in the coupling of CO2 and cyclohexene oxide (CHO) into cis-cyclohexene carbonate (cis-CHC). More importantly, the oxo-vanadium complex bearing the less electron-donating benzannulated NHC ligand was found to be more active in CHO conversion to poly(cyclohexene carbonate) (PCHC) in addition to the cis-CHC, highlighting the beneficial effect of the weak electron-donating ability of the latter vs. saturated NHC ligands within such vanadium catalysts. Evaluation of the saturated NHC imido-vanadium catalyst performance led to the same activity and selectivity as the analogous oxo-vanadium catalysts owing to its reactivity with CO2 via a [2+2] cycloaddition reaction forming an oxo-vanadium species. publishedVersion
- Published
- 2021
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