[6,6]-Phenyl C71 butyric acid derivatives (C70-PCBR3) having a selectivity of greater than 95 wt % of the α-isomer are provided by reacting fullerene C70 with a dialkyl sulfonium tetrafluoroborate having the formula:
富勒烯 C70 与四
氟硼酸二烷基锍反应生成的 [6,6]- 苯基 C71
丁酸衍
生物 (C70-PCBR3),其 α-异构体的选择性大于 95 wt %: