O=C1NC(=O)N(c2ccc(F)cc2)C(=O)/C1=C/c1c[nH]c2ccccc12
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?