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Palladium(II) acetate is readily converted into [Pd<inf>3</inf>(μ<sup>2</sup>-OH)(OAc)<inf>5</inf>] (1) in the presence of water in a range of organic solvents and is also slowly converted in the solid state. Complex 1 can also be formed in nominally anhydrous solvents. Similarly, the analogous alkoxide complexes [Pd<inf>3</inf>(μ<sup>2</sup>-OR)(OAc)<inf>5</inf>] (3) are easily formed in solutions of palladium(II) acetate containing a range of alcohols. An examination of a representative Wacker-type oxidation shows that the Pd-OH complex 1 and a related Pd-oxo complex 4 can be excluded as potential catalytic intermediates in the absence of exogenous water.
Bibliographical note© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
- Acetate ligands
- Homogeneous catalysis