OC(c1ccc(Cl)c(F)c1)c1nc(-c2cccc(F)c2)c[nH]1
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?