alkynes

Question

The acidity of alkynes is due to:

RankGuru · Accepted Answer

**Terminal Alkynes** ($R-C \equiv C-H$) 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 $sp^2$ or $sp^3$ 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 $NaNH_2$).

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alkynes

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