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Question: Answered & Verified by Expert
In a nucleophilic substitution reaction :  R - Br + Cl - DMF R - Cl + Br - ,  which one of the following undergoes complete inversion of configuration ?
ChemistryHaloalkanes and HaloarenesJEE MainJEE Main 2014 (09 Apr Online)
Options:
  • A C6H5CHC6H5Br
  • B C6H5CCH3C6H5Br
  • C C6H5CH2Br
  • D C6H5CH2CH2Br
Solution:
2181 Upvotes Verified Answer
The correct answer is: C6H5CH2CH2Br
In SN2 (nucleophilic bimolecular substitution) inversion takes place

SN21stearic hindrance

Rate of R–X is 1° > 2° > 3°

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