Plotting orbitals/density from NWCHEM output

  • Thread starter Thread starter Einstein Mcfly
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SUMMARY

This discussion focuses on visualizing orbital and density outputs from NWCHEM, specifically addressing the challenges users face when trying to extract and view this data. Users must specify output types in the NWCHEM input file to generate the necessary .cube files for visualization. While gOpenMol is mentioned as a potential tool for viewing these files, users report difficulties in its configuration and usability. The recommended alternative is using Molekel, where users can open .cube files and manipulate isosurfaces for effective visualization.

PREREQUISITES
  • Familiarity with NWCHEM input file configurations
  • Understanding of .cube file formats
  • Experience with visualization tools like Molekel and gOpenMol
  • Knowledge of isosurface plotting techniques
NEXT STEPS
  • Learn how to configure NWCHEM input files for specific orbital outputs
  • Explore the capabilities of Molekel for advanced .cube file visualization
  • Investigate gOpenMol's configuration requirements for .cube files
  • Study isosurface plotting techniques in computational chemistry
USEFUL FOR

Researchers and students in computational chemistry, particularly those working with NWCHEM outputs and seeking effective visualization methods for orbital and density data.

Einstein Mcfly
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Hello all. Does anyone have any experience in viewing the more detailed output from NWCHEM? It's easy for Gaussian or GAMESS where the outputs themselves are inputs for molden or other programs, but for NWCHEM you have to specify in the input file exactly what sort of output you want for the orbitals etc and I can't figure out how to look at things.

Supposedly once you convert the .cube file you can look at it with gOpenMol, but so far it doesn't seem to be able to do what I want and is difficult to use. There are keywords that you can add in the input file to output the info needed by molden to view the orbitals, but when I try to do this the orbitals don't show up in the viewing menu.

Does anyone have any advice?
 
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i use molekel:
open cube file, then go to surfaces > grid data
pick the value of the isosurface ("value" i think). if you want to plot +ve and -ve, open the cube file twice and set +ve for one molecule and -ve for the other.
hope this helps. i don't know about gOpenMol, but I think that requires some configuration of the cube file.
 

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