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Keywords:

  • chlorine;
  • nickel;
  • metal–arene interactions;
  • metal–metal bonds;
  • P ligands
Thumbnail image of graphical abstract

The dinickel chloride affair: In dinuclear nickel(I) complexes supported by a tris(phosphinoaryl)benzene and stabilized by metal–arene interactions, chloride addition causes reversible Ni[BOND]Ni bond cleavage that induces 180° rotation around an aryl–aryl bond (see scheme). A dinickel–chloride moiety was found to rotate around the bridging arene by a mechanism involving breaking and forming Ni[BOND]P bonds.