Question

Consider the following bromides :
The correct order of SN1 reactivity is
(a) B > C > A (b) B > A > C
(c) C > B > A (d) A > B > C

Answer 1

The correct order of stability is B > C > A.

Option (A) is correct.

Explanation:

• Higher the stability of carbocation, faster is the reaction because SN1 reaction involves the formation of carbocation.
• SN1 proceeds via carbocation intermediate, the most stable one forming the product faster.
• Hence reactivity order for A, B, C depends on stability of carbocation created.

The correct order of stability is B > C > A.

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