Which of the following favors SN^1 reaction.?

MHT CET 2026 Chemistry question

Which of the following favors SN reaction.?

(A)Strong nucleophile
(B)Non - Polar solvent
(C)Bulky alkyl groups on the carbon atom attached to halogen atomCorrect
(D)Small alkyl groups on the carbon atom attached to halogen atom

Answer: (C)

Solution

The SN1 reaction is a two-step mechanism whose slow step is ionisation of the C-X bond to a carbocation, so it is favoured by anything that stabilises the carbocation: bulky alkyl groups (tertiary halides, +I and hyperconjugation), a polar protic solvent (to stabilise ions) and a good leaving group. The

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Question ID VK-097589