Abstract The [60] fullerene–cycloheptatriene dyad 1 readily underwent [4+ 2] cycloaddition of molecular oxygen at the cycloheptatriene moiety to give endoperoxides 5-exo and 5- endo. The involvement of singlet oxygen was verified by the complete inhibition of oxygenation on addition of 1, 4-diazabicyclo [2.2. 2] octane (DABCO), which is an efficient singlet-oxygen quencher. The observed facile oxygenation was attributed to both the ...
