Cc1cc(Cl)ccc1NS(=O)(=O)c1ccc2c(c1)CC(C)N2C(=O)C1CCC1
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?