Cc1cc(C)[n+](-c2ccc(F)cc2)c2[nH]c(=O)[nH]c(=O)c12.[I-]
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?