Cc1cc(-c2ccc(/N=N/c3cc(S(=O)(=O)[O-])c4ccccc4c3N)c(C)c2)ccc1/N=N/c1cc(S(=O)(=O)[O-])c2ccccc2c1N.[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?