MHT CET202124 Sep 2021Evening ShiftChemistryHaloalkanes and HaloarenesActual
Which among the following is NOT a feature of S _ N 1 mechanisms?
Options
- AInvolve only backside attack of nucleophile.
- BIn an optically active substrate the product formed is racemic.
- CTwo step mechanism.
- DHeterolysis of C - X bond forms carbocation intermediate.
Correct answer
A. Involve only backside attack of nucleophile.
Step-by-step solution
(1) When C is chiral, then product of SN ^1 reaction is racemic mixture, & the reaction is known as racemization. In planner carbocation nucleophile attack from both front and back side. In SN ^1 reaction both inversion & retention of configuration takes place. (2) Two step mechanism Thus, option A is incorrect (3) Heterolysis of C - X bond forms carbocation intermediate