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Keywords:

  • density functional calculations;
  • hydrides;
  • metal arene;
  • molybdenum;
  • multiple bonds
Thumbnail image of graphical abstract

Five plus H2 gives four: UV irradiation of a bis(amidinate) complex with a [(H)Mo[QUAD BOND]Mo(H)] core induces reductive elimination of H2 and formation of a known quintuply bonded Mo[BOND]Mo species (see scheme) that reacts back with H2 to restore [(H)Mo[QUAD BOND]Mo(H)]. UV irradiation of the bis(hydride) species in benzene and toluene gives arene complexes in which the aromatic hydrocarbon bridges the molybdenum atoms. Dipp=2,6-diisopropylphenyl.