Cyclization of dinuclear aryl- and aroylpalladium complexes with the metal centers tethered by an oligo(ethylene oxide) chain. Intramolecular transmetalation of the cationic dinuclear arylpalladium complexes

The reaction of the dinuclear palladium(II) complexes [(bpy)(I)Pd{C6H4(OCH2CH2)(0.5n+0.5)}](2)O (n = 3, 5) and [(bpy)(I)Pd{COC6H4(OCH2CH2)(2)}](2)O with AgBF4 produces crown ethers including a biphenylene or diaryl ketone part via intramolecular transfer of the aryl ligand and subsequent reductive elimination of the macrocyclic products.