CN(CC(=O)Nc1ccc(Cl)cc1F)S(=O)(=O)c1ccc2c(c1)n(C)c(=O)c(=O)n2C
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?