Avagadro Software and The Inversion Potential of Ammonia

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SUMMARY

The discussion centers on the use of Avogadro software for calculating the potential energy curve of ammonia's inversion. The user, KQ6UP, seeks to derive energy eigenvalues for a graduate quantum mechanics paper. However, it is established that Avogadro, primarily a molecular editor, does not provide potential energy curves directly. Instead, users are advised to utilize quantum chemistry programs that implement density functional theory (DFT) for accurate calculations.

PREREQUISITES
  • Understanding of quantum mechanics principles, particularly energy eigenvalues.
  • Familiarity with Avogadro software functionalities.
  • Knowledge of density functional theory (DFT) in quantum chemistry.
  • Basic skills in numerical methods for data analysis.
NEXT STEPS
  • Explore quantum chemistry software options that support DFT, such as Gaussian or ORCA.
  • Learn how to use Avogadro plugins for enhanced molecular modeling.
  • Study the methodology for calculating potential energy curves in quantum mechanics.
  • Investigate the relationship between calculated energy eigenvalues and measured microwave spectra.
USEFUL FOR

This discussion is beneficial for graduate students in quantum mechanics, computational chemists, and researchers interested in molecular modeling and energy calculations.

kq6up
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Would it be possible to get a 1 degree of freedom (the saddle line of the potential energy surface) potential energy curve from the inversion of Ammonia from the software Avagadro (I have just started playing with this software yesterday)? I am doing a physics paper for a graduate QM class, and I would like to try to calculate the energy eigenvalues by numeric methods using this data. Then compare with the measured microwave spectra.

Thanks,
KQ6UP
 
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From what I understand, Avogadro is a molecule editor. As such, it won't give you a potential energy curve. You would have to use some quantum chemistry program, e.g. using density functional theory.
 
Thanks,

Avagadro looks like it has plugins. Do any of these give potential energy data?

Thanks,
KQ6UP
 

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