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What is the main mechanism of the reaction between an alkyl halide and a nucleop

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Question: What is the main mechanism of the reaction between an alkyl halide and a nucleophile in a bimolecular nucleophilic substitution (SN2) reaction?

Options:

  1. Formation of a carbocation
  2. Direct attack of the nucleophile
  3. Formation of a cyclic intermediate
  4. Elimination of a leaving group

Correct Answer: Direct attack of the nucleophile

Solution: 

In an SN2 reaction, the nucleophile directly attacks the electrophilic carbon, leading to the simultaneous displacement of the leaving group.

What is the main mechanism of the reaction between an alkyl halide and a nucleop

Practice Questions

Q1
What is the main mechanism of the reaction between an alkyl halide and a nucleophile in a bimolecular nucleophilic substitution (SN2) reaction?
  1. Formation of a carbocation
  2. Direct attack of the nucleophile
  3. Formation of a cyclic intermediate
  4. Elimination of a leaving group

Questions & Step-by-Step Solutions

What is the main mechanism of the reaction between an alkyl halide and a nucleophile in a bimolecular nucleophilic substitution (SN2) reaction?
  • Step 1: Identify the alkyl halide, which has a carbon atom bonded to a halogen (the leaving group).
  • Step 2: Recognize the nucleophile, which is a species that has a lone pair of electrons and can donate them to form a bond.
  • Step 3: Understand that in an SN2 reaction, the nucleophile approaches the carbon atom that is bonded to the halogen.
  • Step 4: The nucleophile attacks the carbon atom from the opposite side of the leaving group, creating a transition state.
  • Step 5: As the nucleophile forms a bond with the carbon, the bond between the carbon and the halogen breaks, allowing the halogen to leave.
  • Step 6: The result is a new molecule where the nucleophile is now bonded to the carbon, and the halogen has been displaced.
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