CCc1ccccc1NC(=O)Nc1cc(C(=O)NCc2cccc(F)c2)ccc1N1CCCC1
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?