Q56C - Organic Chemistry (Mcmurry)

Question

Question: Order each of the following sets of compounds with respect to reactivity:

Step-by-Step Solution

Answer

Answer

Step1: S N 2 reaction

It is the substitution nucleophilic unimolecular reaction. It follows first-order kinetics that it is a two-step reaction in which a carbocation intermediate is formed.

The rate of the reaction depends only on the reacting species and is independent of the nucleophile.

Step2: Reactivity towards S N 2 reaction

As the carbocation intermediate is formed in the reaction the reacting species which form the most stable carbocation is more reactive toward the nucleophile.

 Stability of carbocation:

1. 3⁰ > 2⁰ > 1⁰
2. If carbocation showing resonance is more stable than non-resonance carbocation 

So, 

            Reactivity order