SAPT with ECPs possible in master? RI-MP2 frequency calc?

  1. Being that ECPs are now implemented in the master version, is it now possible to run SAPT calculations with density fitting and ECPs for lets say Iodine. I checked the list of included basis sets ( and it appears some go from Rb to Rn, do they include ECP’s by default, judging from this example ( they do? Also, if a basis set is inputed manually and it has an ECP how will the density fitting procedure handle this by default?

  2. I am looking to perform some RI-MP2 frequency calculations but I’ve noticed that analytic gradients are still unavailable… are there any benchmark how this performs in terms of speed and ram/disk usage compared to the number of basis functions?

Thanks a lot,
and sorry for the bunch of questions.