Bimetallic palladium catalysis: direct observation of Pd(III)-Pd(III) intermediates.
PhI(OAc)(2) is a common oxidant for Pd-catalyzed C-H bond functionalizations. Mechanistic hypotheses since the 1960s have suggested a Pd(II)/Pd(IV) mechanism. Here we present evidence for the relevance of bimetallic Pd(III) complexes to catalysis. A bimetallic Pd(III) acetate was isolated and can afford product by bimetallic reductive elimination.
Powers
David C
DC
Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, USA.
Geibel
Matthias A L
MA
Klein
Johannes E M N
JE
Ritter
Tobias
T
D002384:Catalysis; D007700:Kinetics; D010165:Palladium / Q000737:chemistry*
D010165:Palladium