I performed a geometry optimization using M06-2X/6-31G(d). I want to use this optimized geometry for energy calculation using HF/6-311+G9d,p). How do I tell Gaussian to use my output from first job as input for next ?
1. The best way to do that is to use the "Geom=AllCheck" keyword, which takes the molecule specification (including variables), the charge and multiplicity, and the title section from the checkpoint file. See this link:
http://www.gaussian.com/g_tech/g_ur/k_geom.htm
2. You can open your output file in GaussView and save it as a .gjf input file with your desired simulation settings for the HF single point energy calculation.
3. If you don't have GaussView and want to create your input file by hand, you can copy and paste the final optimized geometry information at the end of your output file and use that in your .gjf input file. During the geometry optimization, the geometry is printed out in a table at the end of each step.
You can search your text output for the keyword "Optimized Parameters" or "Optimization completed", which brings you to a section like this:
1. The best way to do that is to use the "Geom=AllCheck" keyword, which takes the molecule specification (including variables), the charge and multiplicity, and the title section from the checkpoint file. See this link:
http://www.gaussian.com/g_tech/g_ur/k_geom.htm
2. You can open your output file in GaussView and save it as a .gjf input file with your desired simulation settings for the HF single point energy calculation.
3. If you don't have GaussView and want to create your input file by hand, you can copy and paste the final optimized geometry information at the end of your output file and use that in your .gjf input file. During the geometry optimization, the geometry is printed out in a table at the end of each step.
You can search your text output for the keyword "Optimized Parameters" or "Optimization completed", which brings you to a section like this:
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