O=C(Nc1ccccc1)N1N=C(c2ccc(F)cc2)CC1c1ccc(F)cc1
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?