1. If you calculate CHELPG or MK charges (these are based on the electric field generated by the molecule) with "heavy heavy" atoms, I get an error message that there is no atomic radius (stored in the program) for Ge (for example).
I notice that there are keywords readradii and readatradii. But I don't know what radius to input. Will just any tabulated "atomic radius" do?
2. I would like to calculate GAPT charges also (these are based on how the dipole moment changes as atoms are moved). But I can't find the proper option under either pop or freq. How does one do a GAPT calculation? If Gaussian can't do it is there another program that reads the output or checkpoint file and does the calculation?
--David Shobe