Cc1c(C(=O)C/C(=N\O)C(=O)Nc2cc(Cl)c(Cl)cc2Cl)[n+]([O-])c2ccccc2[n+]1[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 pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the pka value of this molecule?