Having used HF-3c to establish that MBE(2) provides reliably converged interaction energies (which is not the same as accurate inter- action energies), we next examine MBE(2) calculations using ωB97X-V in various basis sets; see Table . The value of |∆E int | is reduced as the basis set is enlarged, consistent with a reduction in BSSE, and we expect that DFT/def2-ma-QZVP results lie near the DFT/CBS limit even without counterpoise correction. Smaller models of 181L and 1LI2 were examined a previous study, where it was concluded that ωB97M-V/def2-ma-QZVP calculations without counterpoise correction were within 0.2 kcal/mol of the ωB97M-V/CBS limit. For comparison, uncorrected ωB97M-V/def2-ma-TZVP calculations were 1.1-1.7 kcal/mol from the CBS limit, erring towards overbinding, while uncorrected ωB97M-V/def2-ma-SVP calculations overestimated |∆E int | 5.0-6.1 kcal/mol as compared to the ωB97M-V/CBS limit. These results from Ref. 83 use a different functional (ωB97M-V) as compared to that used here (ωB97X-V), which is unlikely to affect convergence to the CBS limit, but they correspond to small (5 Å) models with less than 300 atoms so that the BSSE is likely somewhat smaller than it is in the present calculations.