O=C(Cn1nnc2c(cnn2-c2ccc(F)cc2)c1=O)c1ccccc1F
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?