Grambow et al. only searched for elementary reactions starting from single reactant molecules, but they found a lot of products with two fragments. From these back-reactions, we extract a set of 20 target reactions with barriers below 30 kcal/mol, where two molecules react to create a single molecule Target reaction R10077 which is found with meta-MD using the secondary parameter set, but where the GFN2-xTB barrier estimate from RMSD-PP is too high (60 kcal/mol). The reaction energy is ∆E = -39 kcal/mol and the barrier is ∆E † = 10 kcal/mol calculated with ωB97X-D3/def2-TZVP (Table ). The barriers range between 8 and 28 kcal/mol and reaction energies range between -58 and 8 kcal/mol. Unlike for the unimolecular reactants above, these bimolecular reactants were not subjected to a thorough reaction discovery search so it is more likely that there will be additional reactions with barriers below 30 kcal/mol. As with the unimolecular reactions above, we re-optimize the TS structures provided by Grambow et al. at the ωB97X-D/def2-TZVP level of theory and confirm that they connect the stated reactant and product with an IRC.