CCN1C(=O)C(Cc2nc3ccccc3c(=O)n2-c2ccccc2)c2cc(Br)ccc21
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?