Cc1nc2ccc(S(=O)(=O)Nc3ccccc3Cl)cc2c(=O)n1NC(=O)CNc1ccccc1Cl
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?