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What is the stereochemical configuration of the product formed from the reaction

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Question: What is the stereochemical configuration of the product formed from the reaction of (R)-2-bromobutane with a strong nucleophile in an S_N2 reaction?

Options:

  1. R
  2. S
  3. R and S
  4. No stereochemical change

Correct Answer: S

Solution: 

The S_N2 reaction will invert the configuration, resulting in the (S) configuration for the product.

What is the stereochemical configuration of the product formed from the reaction

Practice Questions

Q1
What is the stereochemical configuration of the product formed from the reaction of (R)-2-bromobutane with a strong nucleophile in an S_N2 reaction?
  1. R
  2. S
  3. R and S
  4. No stereochemical change

Questions & Step-by-Step Solutions

What is the stereochemical configuration of the product formed from the reaction of (R)-2-bromobutane with a strong nucleophile in an S_N2 reaction?
  • Step 1: Identify the starting material, which is (R)-2-bromobutane. This means the molecule has a specific 3D arrangement of atoms.
  • Step 2: Understand that an S_N2 reaction involves a strong nucleophile attacking the carbon atom that is bonded to the bromine atom (the leaving group).
  • Step 3: Recognize that in an S_N2 reaction, the nucleophile attacks from the opposite side of the leaving group (bromine), leading to a change in the configuration.
  • Step 4: Since the starting material is (R)-2-bromobutane, the attack by the nucleophile will cause the configuration to invert.
  • Step 5: Conclude that the product will have the (S) configuration due to this inversion.
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