N#C/C(c1nc2ccccc2[nH]1)=c1\s/c(=C/c2ccccc2)c(=O)n1-c1ccccc1
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?