The fullerenes C60 and C70 form adducts with toluene, p-xylene and other aromatic compounds when refluxed in these solvents in the presence of FeCl3. Benzene derivatives are produced only when bromine is also present. Mass spectra of the reaction mixtures indicate the presence of derivatives including 1:1 adducts, as well as products of multiple additions of the aromatic molecules and their dehydrogenation products. Tandem mass spectrometry provides evidence for C-C bond formation between the adducts and fullerenes.