What question did this study set out to answer?

The aim is to extend the PM3 model to include accurate aqueous solvation effects.

PM3‐SM3: A general parameterization for including aqueous solvation effects in the PM3 molecular orbital model

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The aim is to extend the PM3 model to include accurate aqueous solvation effects.
Developed a scheme to incorporate aqueous solvation free energies in PM3 molecular orbital model.
Included eight heteroatoms along with hydrogen and carbon in the analysis.
Accurately parameterized the model specifically for water molecules.
The model accounts for hydrophobic effects and electric polarization, improving accuracy in solvation predictions.
Unphysical partial charges on nitrogen limit the model's performance for nitrogen-containing compounds.
The model is particularly useful for systems favoring PM3 over AM1 for solute properties.

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Randomized trial investigates solvation effects in parameterized models, indicating improved accuracy for hydrocarbons.

Cramer et al. (1992) studied this question.

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