CCOC(=O)c1nn(-c2cccc(Cl)c2)c2nc(Nc3ccccc3)cc(=O)n12
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?