As the question states, can one use the basis sets of Ahlrichs and coworkers (e.g. def2-SVP, def2-TZVP, ...) with diffuse functions (e.g. def2-TZVPD) in Gaussian?
The regular basis sets have been implemented, but not the diffuse functions according to their homepage. Is there some other way to access diffuse functions for these basis sets in Gaussian?