Markovnikov's Rule
Easychemistry
In the addition of HBr to propene, the major product is:
Select the correct option:
Solution
Incorrect! Answer:
2-Bromopropane
Markovnikov's Rule applies to the electrophilic addition of asymmetric reagents (like HBr) to asymmetric alkenes.
- Rule: The positive part of the reagent (H+) adds to the carbon atom of the double bond that already has the greater number of hydrogen atoms.
- Mechanism: The reaction proceeds through a carbocation intermediate.
- In Propene (CH3−CH=CH2), H+ adds to C1, forming a Secondary carbocation (CH3−CH+−CH3), which is more stable than a primary one. Subsequent Br− attack yields 2-Bromopropane.
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About This Question
- Subject
- chemistry
- Chapter
- hydrocarbons
- Topic
- markovnikov's rule
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
2-Bromopropane
Markovnikov's Rule applies to the electrophilic addition of asymmetric reagents (like HBr) to asymmetric alkenes.
- Rule: The positive part of the reagent (H+) adds to the carbon atom of the double bond that already has the greater number of hydrogen atoms.
- Mechanism: The reaction proceeds through a carbocation intermediate.
- In Propene (CH3−CH=CH2), H+ adds to C1, forming a Secondary carbocation (CH3−CH+−CH3), which is more stable than a primary one. Subsequent Br− attack yields 2-Bromopropane.
This easy difficulty chemistry question is from the chapter hydrocarbons, covering the topic of markovnikov's rule. It appeared in the 2025 exam.
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