ωB97M-V: A combinatorially optimized, range-separated hybrid, meta-GGA density functional with VV10 nonlocal correlation

A combinatorially optimized, range-separated hybrid, meta-GGA density functional with VV10 nonlocal correlation is presented. The final 12-parameter functional form is selected from approximately 10 x 10(9) candidate fits that are trained on a training set of 870 data points and tested on a primary test set of 2964 data points. The resulting density functional, omega B97M-V, is further tested for transferability on a secondary test set of 1152 data points. For comparison, omega B97M-V is benchmarked against 11 leading density functionals including M06-2X, omega B97X-D, M08-HX, M11, omega M05-D, omega B97X-V, and MN15. Encouragingly, the overall performance of omega B97M-V on nearly 5000 data points clearly surpasses that of all of the tested density functionals. In order to facilitate the use of omega B97M-V, its basis set dependence and integration grid sensitivity are thoroughly assessed, and recommendations that take into account both efficiency and accuracy are provided. Published by AIP Publishing.