Open Command Prompt and type:
g16 < test001.com
Or launch the GaussView 6 GUI (if installed) to visually build molecules.
✅ You should see Normal termination of Gaussian 16 in the output file. download+gaussian+16+windows+new
Select destination folder
Avoid spaces in the path. Example: C:\Gaussian\G16W
Set environment variables (critical)
After installation, manually add: Open Command Prompt and type:
g16 < test001
Restart your PC for variables to take effect.
For most computational chemistry work on Windows: Or launch the GaussView 6 GUI (if installed)
If you need help with your specific use case (e.g., calculating transition states, NMR, or UV-Vis spectra), let me know and I can provide input file examples or optimization tips for whichever software path you choose.
Assuming you have a valid license (a license file named gaussian-16.lic and a download link from Gaussian, Inc.), here is the correct procedure.