We also optimized a standard range-separated hybrid ωB97X21-D3(BJ) using the same approach, this functional produced greater errors than ωB97X-V, despite containing similar components (with the exception of the dispersion component). The WM21-D3(BJ) functional results in much lower errors than ωB97X21-D3(BJ), showcasing the ability of UW12 correlation to improve the accuracy of a calculation.