Carbon–Carbon Bond-Forming Reductive Elimination from Isolated Nickel(III) Complexes

This manuscript describes the design, synthesis, characterization, and reactivity studies of organometallic Ni^III complexes of general structure TpNi^III(R)­(R¹) (Tp = tris­(pyrazolyl)­borate). With appropriate selection of the R and R¹ ligands, the complexes are stable at room temperature and can be characterized by cyclic voltammetry, EPR spectroscopy, and X-ray crystallography. Upon heating, many of these Ni^III compounds undergo C­(sp²)–C­(sp²) or C­(sp³)–C­(sp²) bond-forming reactions that are challenging at lower oxidation states of nickel.