JEE Mains · Chemistry · STD 12 - 6. Haloalkanes and Haloarenes
In \({S_{{N^2}}}\) reactions, the correct order of reactivity for the following compounds :
- A \(CH_3Cl > (CH_3)_2CHCl > CH_3CH_2Cl > ( CH_3)_3CCl\)
- B \(CH_3Cl > CH_3CH_2 Cl > (CH_3)_2CHCl > (CH_3)_3CCl\)
- C \(CH_3CH_2 Cl > CH_3Cl > (CH_3)_2CHCl > (CH_3)_3CCl\)
- D \((CH_3 )_2CHCl > CH_3CH_2Cl > CH_3Cl > (CH_3)_3CCl\)
Answer & Solution
Correct Answer
(B) \(CH_3Cl > CH_3CH_2 Cl > (CH_3)_2CHCl > (CH_3)_3CCl\)
Step-by-step Solution
Detailed explanation
Rate of \({S_{{N^2}}} \propto \frac{1}{\text { Steric crowding of }^{\prime} C^{\prime}}\) As steric hindrance (crowding) increases, the rate of \({S_{{N^2}}}\) reaction decreases. The order of reactivity towards \({S_{{N^2}}}\) reaction for alkyl halides is Primary halides…
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