Because acidic character ∝ stability of conjugate base (Anion)
(a) CH=C−anion(−ve on Csp)
(b) CH3−C≡C−(−ve on Csp and +I of −CH3)
(c) CH2=C−H(−ve on Csp2)
Acidic character order CspCH≡C−>Cspwith+I of CH3CH3−C≡C−>Csp2CH2=C−
The correct order for acid strength of compounds CH≡CH,CH3−C≡CH and CH2=CH2 is as follows:
Held on 12 Jan 2019 · Verified 6 Jul 2026.
CH3−C≡CH>CH≡CH>CH2=CH2
HC≡CH>CH3−C≡CH>CH2=CH2
CH≡CH>CH2=CH2>CH3−C≡CH
CH2−C≡CH>CH2=CH2>HC≡CH
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