Cc1cc(-n2ccnc(NCCc3ccc(S(N)(=O)=O)cc3)c2=O)ccc1Br
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?