As with polynitrocubanes, new high-energy materials will be the likely result of bonding multiple nitro groups to a buckminsterfullerene (C60) backbone. Here, we present a series of semi-empirical calculations on nitrofullerenes of varying nitro content. Enough nitrofullerene molecules were calculated to allow an extrapolation to pernitrobuckminsterfullerene, or C60(NO2)60.