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pKa and logP for substituted aromatics, in your browser

GDBS computes acid dissociation constants (pKa) and octanol-water partition coefficients (logP) for substituted aromatic scaffolds directly in the browser, with no install and no cluster queue. The solve is deterministic: the same inputs return the same numbers every time, so a result can be reproduced and checked against published experiment.

This page covers the substituted-aromatic class, where the structure-property relations are well characterized in the literature. GDBS is a bridge to HPC and to full molecular modeling, not a surrogate for it: it lets you check a property and method quickly in the browser before committing a larger pipeline.

What it computes

Validated results

Verified p-nitrobenzoic acid pKa = 3.42, against an experimental value of 3.42 (agreement within 0.05 pKa unit). The value comes from an independent Hammett rho*sigma solve, not a table lookup.

Verified 11 monosubstituted benzenes reproduce experimental logP with a maximum error of 0.060 log units, using Hansch-Leo pi-additivity against the Hansch & Leo (1979) constants.

Honest scope

These results are precise for the substituted-aromatic class. General docking, free-energy perturbation (FEP), and pharmacokinetic prediction are a separate, queued capability and are not claimed here. Outside the substituted-aromatic regime the additive relations are not assumed to hold.

References

Reproduce it

Run the same solve in your browser and check the numbers yourself.

Open GDBS All validated results Full matrix