Which of the following statements about the mechanism of electrophilic aromatic substitution is not true?
A)All electrophilic aromatic substitution reactions occur via a two-step mechanism.
B)The transition state of the first step is lower in energy.
C)The first step is the rate-determining step.
D)The second step is the fast step.

Question

Quizplus · Accepted Answer

The transition state of the first step is actually higher in energy than the reactants, and is the rate-determining step. The second step, which is the removal of the proton, is usually fast and not rate-determining.

Which of the Following Statements About the Mechanism of Electrophilic