Cc1ccc(N(C(=O)CC(=O)N2N=C(c3ccccc3)C(/N=N/c3ccc([N+](=O)[O-])cc3)C2=O)C(=O)c2ccc(Cl)cc2)cc1
The negative base-10 logarithmic of dissociation constant (pKa) for an acid is a direct consequence of the underlying thermodynamics of the dissociation reaction; the negative pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the negative pKa value of this molecule?