O=S(=O)(Nc1cccc(-c2ccc(N3CCCCC3)nn2)c1)c1cccc(F)c1
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?