CN(C)/C=C/C(=O)c1ccc([N+](=O)[O-])c(CS(=O)(=O)c2ccccc2)c1
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?