Cn1c(NC(=O)C[n+]2cc(-c3ccc(Cl)cc3)n3c2CCC3)cc(=O)n(C)c1=O.[Cl-]
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?