From the IQmol web site: IQmol is a free open-source molecular editor and visualization package. It offers a range of features including a molecular editor, surface generation (orbitals and densities) and animations (vibrational modes and reaction pathways).


  • 2.2

Authorized Users

  • CIRCE account holders
  • SC account holders


  • CIRCE cluster
  • SC cluster


IQmol requires the following module file to run:

  • apps/iqmol/2.2

Running IQmol on CIRCE/SC

The IQmol user guide is essential to understanding the application and making the most of it. The guide and this page should help you to get started with your simulations. Please refer to the Documentation section for a link to the guide.

  • Note on CIRCE: Make sure to run your jobs from your $WORK directory!
  • Note: Scripts are provided as examples only. Your SLURM executables, tools, and options may vary from the example below. For help on submitting jobs to the queue, see our SLURM User’s Guide.

Starting the Application

Establishing a GUI connection to CIRCE/SC

To use IQmol, you will need to connect to CIRCE/SC with GUI redirection, either using:

  • CIRCE/SC Desktop Environment
  • SSH with X11 redirection
    • If connecting from OSX or Linux via SSH, please ensure that you use one of the following commands to properly redirect X11:
      • [user@localhost ~]$ ssh -X
      • [user@localhost ~]$ ssh -X

Once connected to CIRCE/SC, you can open IQmol using the steps below:

[user@login0 ~]$ module add apps/iqmol/2.2
[user@login0 ~]$ iqmol

Finally, go to File->Open and open your molecule file.


Home Page, User Guides, and Manuals

Benchmarks, Known Tests, Examples, Tutorials, and Other Resources

  • IQmol Known Sample inputs
    • /apps/iqmol/2.2/samples

Reporting Bugs

Report bugs with IQmol to the IT Help Desk: