Chapter 8, Problem 8.17YT

Interpretation Introduction

Interpretation:

The step that makes the given mechanism unreasonable is to be labeled and explained.

Concept introduction:

Under the acidic condition, strong basic intermediate or a species is not compatible because the proton transfer reaction between acid proton and the base ${}^{\text{-}}\text{OH}$ takes place immediately. Under the basic condition, strong acidic intermediate or a species is not compatible because the proton transfer reaction between acid proton and the base takes place readily. Under the neutral condition, this proton transfer reaction is unreasonable and likely to not occur.