Synthesis of open-[70]fullerenes bearing huge orifices.

Orifices with ring-atom counts of up to 13 have been created on [70]fullerenes as an isolable form. Herein, we report orifice-enlargement reactions providing huge orifices on [70]fullerene with ring-atom counts of 17, 18, and 20. These orifices allow H 2 O, N 2 , and Ar to be encapulated in situ inside the open-[70]fullerene cavity.