JEE Main Chemistry question

Which of the following is arranged according to the nature indicated (the correct anti-periplanar E2 elimination geometry)?

(A)The Newman-projection scheme with Br and the β-H anti-periplanar, OH⁻ approaching from the opposite faceCorrect
(B)A scheme with Br and the β-H in a gauche (non-anti) relationship
(C)A scheme with Br and the β-H eclipsed
(D)A scheme with the base attacking syn to the leaving group

Answer: (A)

Solution

E2 elimination proceeds most readily through a transition state in which the leaving group and the β-hydrogen being removed

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Question ID VK-139276