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Keywords:

  • EPR spectroscopy;
  • dinitrogen ligands;
  • hapticity;
  • redox switch;
  • zirconium
Thumbnail image of graphical abstract

N2 shuffle: One-electron reduction of the ansa-zirconocene complex with a side-on dinitrogen ligand furnished the corresponding anion in which the hapticity of the N2 ligand changed to end-on. Oxidation of the anion regenerates the neutral complex with concomitant change in N2 hapticity. The zirconocene complexes with unusual (N2)3−/(N2) ligands have been fully characterized. Ad=adamantyl.