O=C(c1ccccc1[N+](=O)[O-])N1N=C(c2ccccc2)CC1(O)C(F)(F)F
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?