CCCCn1c(-c2ccc(Br)cc2F)nc2c1c(=O)[nH]c(=O)n2CC(C)C
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?