CCOC(=O)CCC(C(=O)OCC)n1nnc2cc(Nc3c(C)[n+]([O-])c4ccc(Cl)cc4[n+]3[O-])ccc21
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?