Syntheses and Structures of Phenyl-C81-Butyric Acid Methyl Esters (PCBMs) from M3N@C80

Two new 6,6-open phenyl-C81-butyric acid methyl ester metallofulleroids, M3N@C80PCBM (M = Sc, Y), were synthesized by diazoalkane addition reactions and fully characterized. The results demonstrate that the reactive sites are the same for M3N@C80 (M = Sc, Y) but dramatically different from that of C60.