CCL:G: Gaussian ONIOM problem

From: "Emanuele Rossini" <erossini[*]zedat.fu-berlin.de>
Subject: CCL:G: Gaussian ONIOM problem
Date: Thu, 22 Oct 2015 12:09:10 -0400

 Sent to CCL by: "Emanuele  Rossini" [erossini^zedat.fu-berlin.de]
 Dear all,
 I would like to ask you a general question about ONIOM calculations in
 Gaussian. I would like to perform a two layers QM/MM energy minimization
 (DFT/Amber). Is it possible to freeze the atomic coordinates of the model
 system exclusively during the low level steps (i.e. the classically treated
 atoms that are also considered by the QM part)? In case it is possible, how
 should the input be set?
 Best regards,
 Emanuele Rossini
 erossini_+_zedat.fu-berlin.de
 Macromolecular Modelling Group,
 Freie Universitt Berlin, Fabeckstr. 36a, D-14195, Germany, Berlin-Dahlem