Alkynes
Mediumchemistry
The acidity of alkynes is due to:
Select the correct option:
Solution
Incorrect! Answer:
sp hybridization
Terminal Alkynes (R−C≡C−H) exhibit weak acidic character.
- This is due to the sp hybridization of the carbon atoms in the triple bond.
- An sp orbital has 50% s-character, making it more electronegative than sp2 or sp3 orbitals.
- The sp carbon pulls the shared electron pair of the C−H bond closer to itself, making the H atom more easily removable as a proton (H+) by a strong base (like NaNH2).
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About This Question
- Subject
- chemistry
- Chapter
- hydrocarbons
- Topic
- alkynes
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
sp hybridization
Terminal Alkynes (R−C≡C−H) exhibit weak acidic character.
- This is due to the sp hybridization of the carbon atoms in the triple bond.
- An sp orbital has 50% s-character, making it more electronegative than sp2 or sp3 orbitals.
- The sp carbon pulls the shared electron pair of the C−H bond closer to itself, making the H atom more easily removable as a proton (H+) by a strong base (like NaNH2).
This medium difficulty chemistry question is from the chapter hydrocarbons, covering the topic of alkynes. It appeared in the 2025 exam.
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