Not in all cases is a complete anharmonic force field calculation feasible. We find in Table VIII that B3LYP/cc-pVTZ+1 harmonic zero-point energies scaled by 0.985 reproduce the rigorous anharmonic zero-point energies quite nicely. (The scaling factor is about halfway between what would be required for fundamentals, about 0.97, and harmonics, about 1.00.[67,68])