CC1(C)CCC[C@]2(C)C(C[S+]([O-])c3ccccc3)=C(C=O)CC[C@@H]12
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?