Cc1cc(C(=O)O)ccc1-c1ccc(/C=C2\NC(=O)N(Cc3ccccc3Cl)C2=O)o1
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?