MHT CET · Chemistry · Haloalkanes and Haloarenes
Which among the following is NOT a feature of \(\mathrm{S}_{\mathrm{N}} 1\) mechanisms?
- A Involve only backside attack of nucleophile.
- B In an optically active substrate the product formed is racemic.
- C Two step mechanism.
- D Heterolysis of \(\mathrm{C}-\mathrm{X}\) bond forms carbocation intermediate.
Answer & Solution
Correct Answer
(A) Involve only backside attack of nucleophile.
Step-by-step Solution
Detailed explanation
(1) When \(\mathrm{C}\) is chiral, then product of \(\mathrm{SN}^1\) reaction is racemic mixture, \& the reaction is known as racemization.
In planner carbocation nucleophile attack from both front and back side.
In \(\mathrm{SN}^1\) reaction both inversion \& retention of configuration takes place.
(2) Two step mechanism
Thus, option A is incorrect
(3) Heterolysis of C \(-\mathrm{X}\) bond forms carbocation intermediate
In planner carbocation nucleophile attack from both front and back side.
In \(\mathrm{SN}^1\) reaction both inversion \& retention of configuration takes place.
(2) Two step mechanism
Thus, option A is incorrect
(3) Heterolysis of C \(-\mathrm{X}\) bond forms carbocation intermediate
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