Cc1cc(/N=N/c2ccc(/N=N/c3c(O)c(S(=O)(=O)O)cc4cc(S(=O)(=O)O)ccc34)cc2C)ccc1/N=N/c1ccc2cc(S(=O)(=O)O)cc(S(=O)(=O)O)c2c1
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?