NC(=S)N/N=C1/CN(c2ccc(Cl)c(Cl)c2)CC(=O)C1c1nc2ccccc2s1
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?