Angewandte Chemie International Edition · 2000 · 70 citations · 0 references
Natural SciencesChemical EngineeringChemistryCatalysisOrganic ChemistryPolymer ChemistryCatalyst CharacterizationOlefin PolymerizationPolymerization ChemistryPolymerization ProcessesRing-opening PolymerizationSupported CatalystsCatalyst-solvent InteractionsCopolymer ProductionCopolymerizationIn Situ Process MonitoringIn-situ MonitoringMigratory Insertion In Olefin PolymerizationPalladium CatalystsPolymerization Catalysts
CO-assisted ethene insertion is the most remarkable aspect of the catalytic propagation mechanism of CO/ethene copolymerization at a microcrystalline catalyst, namely, [(dppp)Pd(CH3)(OSO2CF3)] (dppp=1,3-bis(diphenylphosphanyl)propane). Both single propagation steps and copolymer growth (shown schematically; R represents the growing polyketone chain, the phenyl groups in dppp have been omitted) could be monitored in situ under mild, solvent-free reaction conditions with the aid of a very sensitive IR technique, PM-RAIRS.