CCN(CC)CCNC(=O)c1ccc(Cl)c(S(=O)(=O)Nc2ccc(Cl)cc2)c1.Cl
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?