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{C 6 H 4 (OCH 2 CH 2 ) 0.5 n +0.5 }] 2 O ( n = 3, 5) and [(bpy)(I)Pd{COC 6 H 4 (OCH 2 CH 2 ) 2 }] 2 O with AgBF 4 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.