O=C(O)c1nc(Cl)c(Cl)c(N/N=C/c2ccc(N3CCOCC3)c([N+](=O)[O-])c2)c1Cl
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?