Cc1c(CCOC(=O)c2cc([N+](=O)[O-])ccc2Cl)sc[n+]1CCCCS(=O)(=O)[O-]
The negative base-10 logarithmic of dissociation constant (pKa) for an acid is a direct consequence of the underlying thermodynamics of the dissociation reaction; the negative pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the negative pKa value of this molecule?