Journal of the Chemical Society Chemical Communications · 1991 · 45 citations · 2 references
Natural SciencesChemical EngineeringChemistryCatalysisInorganic ChemistryOrganometallic ChemistryCatalyst SynthesisCatalytic MaterialsHeterogeneous CatalysisRedox CatalysisSupported CatalystsZeolite CatalysisElectron TransferMetal-exchanged ZeolitesMetal-organic Framework CatalystsOxidative CatalysisZeolite CatalystsZeolites
Evidence is presented that faujasite-type zeolites with specific Si : Al framework ratios exchanged with Pd(NH3)42+ and Cu2+, catalyse the oxidation of ethylene into acetaldehyde, in exactly the same way as the homogeneous Wacker system [PdII and CuII in concentrated chloride solution]; the active centre is found to be a partially ammoniated PdII ion, most probably PdII(NH3)2, which itself belongs to an electron transfer chain consisting of the alkene reagent, the faujasite encaged PdII/Pd0 and CuII/CuI redox couples and dioxygen.
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