O=C(C1CC(=O)N(c2ccc(F)cc2)C1)N1CCC(c2nc3ccccc3[nH]2)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?