COMEDK · Chemistry · 25. Haloalkanes and Haloarenes

Alkyl halides undergoing \(\mathrm{S}_{\mathrm{N}} 2\) reaction do inverse

A racemic mixture
B retention of configuration
C formation of carbocation
D inversion of configuration

Verified Solution

Answer & Solution

Correct Answer

(D) inversion of configuration

Step-by-step Solution

Detailed explanation

The \(\mathrm{S}_{\mathrm{N}}2\) reaction mechanism involves a concerted process where the nucleophile attacks the electrophilic carbon atom from the side opposite to the leaving group. This backside attack leads to the transition state where the nucleophile and the leaving…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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