CN1/C(=C\C(=O)C[n+]2cccc(C(N)=O)c2)C(C)(C)c2ccccc21.[Cl-]
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?