O=C(C1CCCCC1)N1CC(O)C(n2cc(C3CC3)nn2)CC1c1ccccc1
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?