CCc1ccc([C@@H]2CC=C(C(=O)O)[C@H](c3ccc(Cl)cc3)N2S(=O)(=O)c2ccc(C)cc2)cc1
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?