Cc1nn(Cc2ccc(Cl)cc2Cl)c(Cl)c1C(=O)NC1CCCc2ccccc21
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?