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Reactivity of a Pd(I)−Pd(I) Dimer with O2: Monohapto Pd Superoxide and Dipalladium Peroxide in Equilibrium

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posted on 23.03.2011, 00:00 by Rafael Huacuja, Daniel J. Graham, Claudia M. Fafard, Chun-Hsing Chen, Bruce M. Foxman, David E. Herbert, Glen Alliger, Christine M. Thomas, Oleg V. Ozerov
The Pd(I)−Pd(I) dimer [(FPNP)Pd−]2 reacts with O2 upon exposure to light to produce either the superoxide (FPNP)PdO2 or the peroxide [(FPNP)PdO−]2, which exist in equilibrium with free O2. Both complexes contain square-planar Pd(II) centers. The unpaired electron density in (FPNP)PdO2 is localized on the superoxide ligand.