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Choose the correct option.
Which among the following reacts fastest by reaction:
Which among the following reacts fastest by $\text{S}_\text{N}2$ reaction:
- (1)$(\text{CH}_3)_3\text{C}-\text{Br}$
- (2)$(\text{CH}_3)_2\text{CH}-\text{Br}$
- (3)$\text{CH}_3-\text{CH}_2-\text{Br}$
- (4)$\text{CH}_3-\text{Br}$
Answer
Answer
AICorrect option: (4)
Answer: (4) $\mathrm{CH_3-Br}$
Because it is the least sterically hindered, the nucleophile attacks it most easily in $\mathrm{S_N2}$ (methyl > primary > secondary > tertiary).
From ISC 2018 Specimen Chemistry Paper 1, question 1(b)(ii).