Cc1ccc(C(=O)C2=C(O)C(=O)N(Cc3ccco3)C2c2cccc(Br)c2)o1
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 pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the pka value of this molecule?