RM1 may be used in Gaussian 09
RM1 parameters can be specified in Gaussian 09 in two different formats: Gaussian and MOPAC, via the Input and MOPACExternal options (respectively).
This is fully described in: http://www.gaussian.com/g_tech/g_ur/k_semiempirical.htm
Files for running RM1 in Gaussian in both formats can be downloaded from CompChem.net at:
RM1-Gaussian_Format and RM1-MOPAC_Format
Passwords are required for the .rar compressed files.
Please, send the names of the files by e-mail to Mahmoud A. A. Ibrahim to get the password for free, by simply clicking on the following link: