CC(C)(C#CC(=O)[O-])OOC(c1ccccc1)(c1ccccc1)c1ccccc1.[Na+]
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?