Cc1ccccc1Cn1c(CN2CCN(c3cc(Cl)ccc3C)CC2)nc2c1c(=O)[nH]c(=O)n2C
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 negative pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the negative pKa value of this molecule?