Consider the pK_avalues of the following constitutional isomers:

Using the rules that we developed in this chapter (ARIO), we might have expected these two compounds to have the same pKa. Nevertheless, they are different. Salicylic acid is apparently more acidic than its constitutional isomer. Can you offer an explanation for this observation?

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но. Но. но Он НО Salicylic acid pk = 3.0 para-hydroxybenzoic acid pK = 4.6