Question:
Which of the following protons is the most acidic?
Which of the following protons is the most acidic?
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Higher s character of the carbanion orbital gives greater acidity.
Updated On: Jul 3, 2026
- Proton attached to carbon in an alkane
- Proton attached to carbon in an alkene
- Proton attached to an alkyne carbon
- Proton attached to carbon in an aromatic ring
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The Correct Option is C
Solution and Explanation
Step 1: Acidity increases with s character of the carbanion orbital.
Step 2: sp3 (alkane) 25%, sp2 (alkene/aromatic) 33%, sp (alkyne) 50%.
Step 3: Alkyne's sp orbital gives highest s character, most stable carbanion.
\[\boxed{\text{Proton attached to the alkyne carbon (sp C-H)}}\]Was this answer helpful?
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