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The only lingering question is whether or not the SMARTS pattern restricts the torsion to aromatic rings of this form, where the large force constant might be reasonable, or if it applies anywhere else.
Industry data
The pattern covers 295 molecules in the industry benchmarking data set, as shown in the series of images below:
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TODO: are all of these aromatic rings?
TODO: plot PESs for these torsions to check magnitude of the force constantTODO: generate a similar report on the industry benchmarking data set