CN1C(=O)/C(=N\c2ccc(Cl)cc2)c2c3ccccc3c(O)c3cccc1c23
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?