NOVEL RHODIUM DIOXYGEN COMPLEXES. REACTION OF THE DIOXYGEN LIGAND WITH THE COORDINATED OLEFIN
Novel dinuclear rhodium dioxygen complexes having olefinic ligand are prepared by the reaction of cationic rhodium diene complexes, [(1,5-cyclooctadiene)2Rh]+Y− or [(norbornadiene)2Rh]+Y− (Y− = BF4−, ClO4−), with potassium superoxide in dichloromethane.Transfer of the dioxygen ligand to the coordinated olefin is confirmed by pyrolysis of the complex under an atmosphere of 18O2.