Calculations were performed with the aug-cc-pVDZ, TZ, and QZ basis sets. The HF energy was extrapolated to the CBS limit with an exponential form and the correlation energy was extrapolated with a X -3.05 form, using the TZ and QZ results (X = 2, 3, 4 for DZ, TZ, QZ). As one exception, the reaction involving formation of 8 was too large to treat at the QZ level with CC theory, so extrapolation was performed with a X -2.51 form using only DZ and TZ results. In this work, we focus on the purely electronic energies, i.e., we neglect vibrational corrections and all calculations are performed in the gas phase. This approach facilitates a direct comparison of different levels of electronic structure theory, but of course is not meant to be compared to experimental values. Although we expect small vibrational corrections on the order of 1-2 kcal/mol, the solvation energy corrections are expected to be very large.