All other parameters remain unchanged, with T STRONG SCALE QUADS and T WEAK SCALE QUADS adjusting the tolerances of iterative (Q) triplets commensurately (see Table ). The convergence of the DLPNO-(Q) energy is tested for benzene/cc-pVDZ (114 basis functions), as well as a linear HCNO/cc-pVTZ geometry (104 basis functions). The linear HCNO geometry is derived from the work of Allen et al., optimized at the AE-CCSDTQ(P)/CBS level of theory with MVD1 used for relativistic corrections. The geometry for benzene is provided in the supplementary material. The results for benzene/cc-pVDZ is presented in Figure , while the results for HCNO/cc-pVTZ are presented in 2. The canonical CCSDT(Q) energy for benzene is computed using MRCC, while the reference energy for HCNO is obtained from Allen and coworkers. In our HCNO system, a cc-pV5Z-RI basis set is used for the RI domain for correlated computations to mitigate RI error. In Figures and, the percentage recovery of the DLPNO-(Q) with respect to canonical (Q) is evaluated at a series of QNO cutoffs ranging from 10 -5 to 10 -7 . For both systems, even at a very loose cutoff of 10 -5 , around 90% of the canonical (Q) energy is recovered. To determine a good default value for chemical applications, absolute energy errors (relative to canonical) are also evaluated at each cutoff. For both systems, absolute energy errors of less than 0.1 kcal mol -1 is achieved at T CUT QNO = 10 -6 , which we consider to be sufficiently accurate for a target accuracy in the range of 1 kJ mol -1 (∼ 0.24 kcal mol -1 ), especially in light of error cancellation for relative energies. More than 95% of the (Q) energy is recovered at this cutoff for both systems. ). Reaction energies are presented in Table , while barrier heights are presented in Table . We also present three-dimensional renderings of reactants and products values are in kcal mol -1 and computations performed using the cc-pVDZ basis.