CCS(=O)(=O)c1ncc(N(Cc2ccccc2)Cc2ccco2)c(C(=O)Nc2cccc(Cl)c2C)n1
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?