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. Author manuscript; available in PMC: 2013 Jan 1.
Published in final edited form as: Chem Sci. 2012 Aug 30;3(11):3192–3195. doi: 10.1039/C2SC20800H

Figure 3.

Figure 3

Proposed catalytic cycle. The complete supporting ligand set on Pd is unclear at this time, and nitrate and/or nitrite may serve as ligands during catalysis.