Nc1c(S(=O)(=O)[O-])cc(Nc2ccc(Nc3nc(Cl)nc(Nc4ccc(S(=O)(=O)[O-])cc4)n3)c(S(=O)(=O)[O-])c2)c2c1C(=O)c1ccccc1C2=O.[Na+].[Na+].[Na+]
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?