The rate of an Sɴ¹ reaction is determined by the stability of the carbocation intermediate formed. The more stable the carbocation, the faster the Sɴ¹ reaction. Stability of carbocations generally follows the order: 3° > 2° > 1° > methyl. Resonance stabilization can significantly increase carbocation stability.
The fastest Sɴ¹ reaction is of the followings:
Asked in WBPSC CS Prelims 2017 · Topic: Organic Chemistry (Halogen Containing Organic Compounds: Alkyl and aryl halides, nucleophilic substitution (SN1, SN2) and elimination (E1, E2) reactions.)
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