O=C(CN1C(=O)C2C3CC(C(Br)C3Br)C2C1=O)OCC(=O)c1cccc([N+](=O)[O-])c1
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?