question_answer

The decreasing order of reactivity towards dehydrohalogenation \[\left( {{E}_{1}} \right)\] reaction of the following compounds is
(A)	(B)
(C)	(D)

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A) B > A > D > C

B) B > D > A > C

C) B > D > C > A

D) D > B > C > A

Correct Answer: D

Solution :

[d] Dehydrohalogenation of the given halides by \[{{E}_{1}}\] Mechanism is decided by the stability of carbocation formed in the first step. The correct decreasing order of the given halides towards dehydrohalogenation by \[{{E}_{1}}\] mechanism is