| 초록 |
Metal-ligand cooperation (MLC) is currently receiving much attention as a novel synthetic methodology to expand the role of transition metals in organometallic reactions. While non-innocent phosphine ligands are relatively rare, our group recently reported a new type of MLC by using a PPP ligand. In this system, the reversible phosphide/phosphinite interconversion of a PPP ligand is coupled with a 2-electron redox change of nickel. In addition, the central phosphide moiety can be a single electron donor, which was recognized from the studies of analogous nickel amide species. In this presentation, the MLC redox chemistry of a (PPP)M scaffold (M = Ni or Co) and its application in C1 conversion will be presented. Both nickel and cobalt complexes reveal the reversible formation of a P–P bond involving a single electron exchange between metal and P. The resulting P–P bond containing dimer shows radical-type reactivity toward various substrates under visible-light. |
