Cc1ccc([N+](=O)[O-])cc1S(=O)(=O)Nc1cccc(S(=O)(=O)NC2=NCCC2)c1
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?