Question

the following reaction, the major product alkene is formed by E1cb mechanism?
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Answer 1

Answer:

ook office chhiye tyyiitrs

Answer 2

Answer:

C

Explanation:

Because conditions for E1cb mechanism to occur are:

i) Poor leaving group

ii) Strong base;

Since the base is same everywhere, we look for poor leaving grp, which in this case is Fluorine (because of its high en)

Now that leaves us with option C and D;

If you are well versed with E1cb mech, you will realize that the first step is abstraction of α-acidic hydrogen, which leaves us with only one option ie option C

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