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)(R 1 ) (Tp = tris(pyrazolyl)borate). With appropriate selection of the R and R 1 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(sp 2 )–C(sp 2 ) or C(sp 3 )–C(sp 2 ) bond-forming reactions that are challenging at lower oxidation states of nickel.