O=C(NCc1ccc(F)cc1)c1cccc2c1C(=O)N(Cc1cccnc1)C2
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?