Asked in PMC Practice Test 34 (2021) 2021Moderate

During SN1 mechanism, the nucleophile can attack on the halogen carbon _.

Correct answer: C. From both sides

  • A. From the opposite side of the leaving group
  • B. From the front of the leaving group
  • C. From both sides
  • D. None of these options are correct

Explanation

The correct answer is: From both sides. The nucleophile can attack the carbocation from either the front or the back side during an SN1 mechanism.

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About Nucleophilic Substitution

Nucleophilic substitution replaces a leaving group in an alkyl halide when an electron-rich nucleophile attacks the carbon atom. The topic compares SN1 and SN2 mechanisms, including reaction conditions, substrate structure, solvent effects, nucleophile strength, carbocation formation and stereochemical changes, and distinguishes substitution from elimination.

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