Which among the following is NOT a feature of S_N2 mechanism?

MHT CET 2024 Chemistry question

Which among the following is NOT a feature of mechanism?

(A)Single step mechanism
(B)Backside attack of nucleophile
(C)Formation of planar carbocation intermediateCorrect
(D)Involves simultaneous bond breaking and bond forming

Answer: (C)

Solution

is a one-step, concerted process: the nucleophile attacks the carbon from the side opposite to the leaving group (backside attack), a pentacoordinate transition state forms in which the new bond is forming while the C-X bond is breaking, and inversion

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Question ID VK-095467