For the given E2 elimination reaction, two bases shown, A and B, are to be matched with their respective rate constants according to their pKa values. Concept introduction: Higher the pKa value, the weaker the acid and stronger its conjugate base. As the strength of base increases, it will abstract an acidic proton more rapidly. An E2 reaction is a single step, bimolecular reaction involving both the substrate and the base. Since the deprotonation and the departure of the leaving group occur simultaneously, the rate of the reaction depends more on the strength of the base than on the nature of the leaving group. The stronger the base, the higher the value of the rate constant for an E2 reaction.

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Chapter 9, Problem 9.7P

Interpretation Introduction

Interpretation:

For the given E2 elimination reaction, two bases shown, A and B, are to be matched with their respective rate constants according to their pKa values.

Concept introduction:

Higher the pKa value, the weaker the acid and stronger its conjugate base.

As the strength of base increases, it will abstract an acidic proton more rapidly.

An E2 reaction is a single step, bimolecular reaction involving both the substrate and the base. Since the deprotonation and the departure of the leaving group occur simultaneously, the rate of the reaction depends more on the strength of the base than on the nature of the leaving group. The stronger the base, the higher the value of the rate constant for an E2 reaction.

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