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Keywords:

  • cage compounds;
  • host–guest systems;
  • organometallic chemistry;
  • photochemistry;
  • self-assembly
Thumbnail image of graphical abstract

Under confinement: Photosubstitution of a CO ligand with an alkyne on a dinuclear ruthenium carbonyl complex within a self-assembled cage occurs without the cleavage of the photolabile Ru[BOND]Ru bond. The resulting Ru–alkyne π complex is a reaction intermediate stabilized inside the cage. Outside the cage, the π complex can be further transformed to a diruthenacyclopentenone framework by intramolecular CO insertion (see scheme).