Cc1ccc(OCC(=O)N2N=C(c3ccc(Cl)cc3)CC2c2ccco2)c([N+](=O)[O-])n1
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?