The thermochemical data in the enum-halocarb4 dataset was used as training data to fit The new Benson groups were systematically created by generating every possible nearestneighbor group with either a carbon or oxygen center atom, bonded to at least one halogen atom. To maintain RMG's performance for estimating CHO thermochemistry, existing groups were held fixed while new halogen groups were fitted using scikit-learn's linear least square ridge regression method with an alpha of 1e-6. In total, 226 Benson groups and 91 long-distance interaction groups were derived using thermochemical data