Trinuclear Pd3O2 Intermediate in Aerobic Oxidation Catalysis |
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| Authors: | Andrew J Ingram Dr Diego Solis‐Ibarra Prof Richard N Zare Prof Robert M Waymouth |
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| Institution: | Department of Chemistry, Stanford University, 333 Campus Drive, Stanford, CA 94305‐5080 (USA) |
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| Abstract: | The activation of O2 is a key step in selective catalytic aerobic oxidation reactions mediated by transition metals. The bridging trinuclear palladium species, (LPdII)3(μ3‐O)2]2+ (L=2,9‐dimethylphenanthroline), was identified during the LPd(OAc)]2(OTf)2‐catalyzed aerobic oxidation of 1,2‐propanediol. Independent synthesis, structural characterization, and catalytic studies of the trinuclear compound show that it is a product of oxygen activation by reduced palladium species and is a competent intermediate in the catalytic aerobic oxidation of alcohols. The formation and catalytic activity of the trinuclear Pd3O2 species illuminates a multinuclear pathway for aerobic oxidation reactions catalyzed by Pd complexes. |
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| Keywords: | aerobic oxidation homogeneous catalysis mass spectrometry palladium reaction mechanisms |
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