As discussed earlier, dispersion corrections offer considerably smaller contributions for range-separated double hybrids than for global double hybrids. Despite this, the combination of spin scaling and range separation yields more consistent and promising results for some functionals that is, SCS-and SOS-ωPBEPP86, and SCS-RSX-QIDH, functionals which for smaller systems overestimate and larger functionals underestimate. SOS-ωPBEPP86-D3(BJ) shows the overall best performance with some of the lowest errors in both D e and r e . However for other functionals, errors of range-separated double hybrids do not compete with dispersion-corrected global double hybrids.