N#CC(C(=N/NC(N)=S)/C(=N/NC(N)=S)C(C#N)c1ccc(Cl)cc1)c1ccc(Cl)cc1
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?