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In the reaction of an alkene with HBr, what is the major product when the alkene

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Question: In the reaction of an alkene with HBr, what is the major product when the alkene is asymmetric?

Options:

  1. Markovnikov product
  2. Anti-Markovnikov product
  3. No reaction
  4. Polymerization

Correct Answer: Markovnikov product

Solution: 

According to Markovnikov\'s rule, the hydrogen from HBr adds to the less substituted carbon of the alkene, leading to the formation of the Markovnikov product.

In the reaction of an alkene with HBr, what is the major product when the alkene

Practice Questions

Q1
In the reaction of an alkene with HBr, what is the major product when the alkene is asymmetric?
  1. Markovnikov product
  2. Anti-Markovnikov product
  3. No reaction
  4. Polymerization

Questions & Step-by-Step Solutions

In the reaction of an alkene with HBr, what is the major product when the alkene is asymmetric?
  • Step 1: Identify the alkene. An alkene is a hydrocarbon with a carbon-carbon double bond.
  • Step 2: Determine if the alkene is asymmetric. An asymmetric alkene has different groups attached to the carbon atoms of the double bond.
  • Step 3: Understand HBr. HBr is a hydrogen bromide molecule that can add across the double bond of the alkene.
  • Step 4: Apply Markovnikov's rule. This rule states that when HBr adds to an asymmetric alkene, the hydrogen (H) will attach to the carbon with fewer alkyl groups (less substituted carbon).
  • Step 5: Identify the major product. The major product will be formed by the hydrogen attaching to the less substituted carbon, and the bromine (Br) will attach to the more substituted carbon.
  • Markovnikov's Rule – In the addition of HX to an asymmetric alkene, the hydrogen atom from HX adds to the carbon with the greater number of hydrogen atoms (less substituted), while the halide (X) adds to the more substituted carbon.
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