We tested the hypothesis that the CRN-T did not find any diol and, presumably, other intermediates and products because of the inherently vast chemical space. This chemical space would not be accessible within the time frame of our computations with LC-PBE based structure searches. To that end, we ran a separate, exploratory reaction exploration starting from tetramethylethene and ozone using GFN2-xTB instead of LC-PBE (abbreviated CRN-T-xTB in Table ). The computing time running on 250 cores was approximately 6 days (1436 days of serial computing), and during that short period of calculation time, it found 133426 reactions and 68721 compounds. Chemoton indeed generated eight different diols (Figure ), but only after CRN-T-xTB included over 40000 reactions vs. 441 reaction with CRN-T, that is s 100-fold increased depth of the exploration. Further qualitative evidence for the operational limitations of LC-PBE-based CRN explorations was obtained from the consideration of typical intermediates of the aqueous ozone chemistry. CRN-T-xTB found additional important products associated with the general decay of ozone not included in CRN-T such as the hydroxyl radical, the superoxide ion and the ozone radical (Figure ). Furthermore, Figure illustrates that singlet and triplet dioxygen, hydrogen peroxide, and water were also present in CRN-T, but involved in a 2-to almost 400-fold lesser frequency than in reactions of CRN-T-xTB. These intermediates did not matter for the reaction of ethene and tetramethylethene with ozone studied here, but would do so in ozonation processes with more complex substrates than olefins. The exploration of the reactions of these ozone decay intermediates, however, was beyond the scope of this study.