After identifying the lowest energy conformer with M06-2X-D3/jun-cc-pvtz, 1D hindered rotors calculations are performed in Gaussian 16 for molecules with internal rotors. For CHOF-containing molecules, the lowest energy conformer was optimized using B3LYP/6-31+G(2df,p) and rotor scans were performed in 10 • increments with the same method. For molecules containing chlorine and bromine, the rotor scans were performed in 15 • increments using M06-2X-D3/jun-cc-pvtz. If a lower energy conformer is found during the rotor scans, the conformer is reoptimized starting with the lower energy coordinates with DFT and the rotor scans are redone. If the rotor scan is discontinuous, the rotor scan is rerun with all of the torsions frozen in the molecule except for the scan torsion. If the rotor scan is still discontinuous, the RRHO approximation is used.