Add the D3 version of Grimme’s dispersion with the original D3 damping function [Grimme10]. The table below gives the list of functionals in Gaussian 09 for which GD3 parameters are defined. For the rest of the functionals, dispersion is requested with EmpiricalDispersion=GD3.
关于GD2
Add the D2 version of Grimme’s dispersion [Grimme06]. The table below gives the list of functionals in Gaussian 09 for which GD2 parameters are defined. The functionals highlighted in bold include this dispersion model by default when the indicated keyword is specified (e.g., B2PLYPD). For the rest of the functionals, dispersion is requested with EmpiricalDispersion=GD2.