CCOc1ccccc1/N=N/C1C(=O)N(C(=O)CC(=O)Nc2ccccc2Cl)N=C1C
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?