ABC26OR0637 · Reaction Mechanism I Ii
Subject: Organic Chemistry · Chapter: Reaction Mechanism I Ii · Topic: Reaction Mechanism – I – Ii – General · Exam: GATE 2000-2022 · Marks: 2 · Difficulty: Medium
Statement: Replacement of $\mathrm{CH}_{3}$ with $\mathrm{CF}_{3}$ decreases the rate of reaction I, but increases the rate of reaction II. 
I. 
II. 
Reason: Reaction I proceeds through $\mathrm{SN}_{1}$ mechanism and reaction II proceeds through $\mathrm{SN}_{2}$ mechanism. Assertion: Being an electron withdrawing group, $\mathrm{CF}_{3}$ destabilizes the transition state in the $\mathrm{SN}_{1}$ reaction, but stabilizes the transition state in the $\mathrm{SN}_{2}$ reaction.
I. II. Reason: Reaction I proceeds through $\mathrm{SN}_{1}$ mechanism and reaction II proceeds through $\mathrm{SN}_{2}$ mechanism. Assertion: Being an electron withdrawing group, $\mathrm{CF}_{3}$ destabilizes the transition state in the $\mathrm{SN}_{1}$ reaction, but stabilizes the transition state in the $\mathrm{SN}_{2}$ reaction.Answer
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Explanation
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