Cc1ccc(C2(O)CC(c3ccc([N+](=O)[O-])o3)=NN2C(=O)COc2ccc(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?