Engineering
Chemistry
Nucleophilic Substitution
Question
Which of the following reaction will show highest rate of reaction by SN2 mechanism.
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Solution
The SN2 reaction rate depends on substrate steric hindrance and leaving group ability. Less steric hindrance (primary > secondary > tertiary) and a good leaving group (like Br-) favor SN2. Among the options, the primary alkyl bromide (1-bromopropane) has the least steric hindrance and a good bromide leaving group, leading to the highest rate.
Final answer: The first option (1-bromopropane) will show the highest rate.