Mechanism of C−F Reductive Elimination from Palladium(IV) Fluorides

摘要

Abstract: The first systematic mechanism study of C F reductive elimination from a transition metal complexnis described. C F bond formation from three different Pd(IV) fluoride complexes was mechanisticallynevaluated. The experimental data suggest that reductive elimination occurs from cationic Pd(IV) fluoridencomplexes via a dissociative mechanism. The ancillary pyridyl-sulfonamide ligand plays a crucial role fornC F reductive elimination, likely due to a κ3 coordination mode, in which an oxygen atom of the sulfonylngroup coordinates to Pd. The pyridyl-sulfonamide can support Pd(IV) and has the appropriate geometrynand electronic structure to induce reductive elimination.