The QM dimer-corrected energy model was applied to all crystal structures within 20 kJ/mol of the global minimum for each molecule. To investigate how FIT+DMA CSP landscapes change using dimer corrections at different levels of quantum mechanical theory, second order Møller-Plesset perturbation theory 71 (MP2) and the hybrid B3LYP functional 62 were selected as higher levels of theory, along with the PBE 72 functional as a reference for GGA methods. In both DFT methods, dispersion corrections were added using Grimme's D3 correction . For each unique dimer, the PBE-D3/6-31+G**, B3LYP-D3/6-31+G** and MP2/6-31+G** interaction energy was evaluated as the difference between the dimer and monomer energies, where basis set superposition error was treated with a counterpoise correction . All QM calculations were performed using Gaussian 09 . Using these energies, the