title: Coupling Reactions of Carbon Dioxide with Epoxides Catalyzed by Vanadium Aminophenolate Complexes.
abstract: A series of vanadium compounds supported by tetradentate aminobis(phenolate) ligands were screened for catalytic reactivity in the reaction of propylene oxide (PO) with CO2: [VO(OMe)(O2NOBuMeMeth)], [VO(OMe)(ON2OBuMe)], [VO(OMe)(O2NNBuBuPy)], and [VO(OMe)(O2NOBuBuFurf)]. They showed similar reactivities, but reaction rates were higher for [VO(OMe)(ON2OBuMe)], which was studied in more detail. Turnover frequencies for conversion of PO over 500 h-1were observed. Activation energies were determined experimentally through in situ IR spectroscopy for propylene carbonate (48.2 kJ mol-1), styrene carbonate (45.6 kJ mol-1), and cyclohexene carbonate (54.7 kJ mol-1) formation.
authors.affiliation: Department of Chemistry, Memorial University of Newfoundland, St. John's, NL, A1B 3X7, Canada.
authors.forename: Ali I
authors.initials: AI
authors.lastname: Elkurtehi
authors.affiliation: Department of Chemistry, Memorial University of Newfoundland, St. John's, NL, A1B 3X7, Canada.
authors.forename: Francesca M
authors.identifier: 0000-0002-8165-473X
authors.initials: FM
authors.lastname: Kerton
mesh_terms: D000627:Aminophenols / Q000737:chemistry*; D002245:Carbon Dioxide / Q000737:chemistry*; D002384:Catalysis; D053138:Cyclohexenes / Q000737:chemistry; D004852:Epoxy Compounds / Q000737:chemistry*; D007700:Kinetics; D009942:Organometallic Compounds / Q000737:chemistry*; D014639:Vanadium / Q000737:chemistry*
chemical_list: D000627:Aminophenols; D053138:Cyclohexenes; D004852:Epoxy Compounds; D009942:Organometallic Compounds; D014639:Vanadium; D002245:Carbon Dioxide; C007193:cyclohexene oxide; C013690:styrene oxide; C009068:propylene oxide
keywords: carbon dioxide; epoxides; homogeneous catalysis; kinetics; vanadium