Аннотация:We have worked out a selective and efficient mode of the synthesis of substituted and unsubstituted piperazine-containing mono-adducts of the C60 fullerene. It is based on the C60 reaction with piperazine, 2-methylpiperazine, and 2-oxopiperazine under air, room temperature and ultrasonication. The intermediate of the sonochemical reaction is radical anion C60 •–, which was detected with EPR (g = 1.9968, ΔH = 5.9 G). This intermediate is generated due to one-electron transfer from piperazine to the C60 molecule.