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Ethyne is a stronger acid than propyne. Explain. |
Answer» Solution :Terminal alkynes `(R-C equiv C-H)` are weakly ACIDIC in nature because of `sp`-hybridised state of the triple bonded carbon ATOM. Due to substantial s-character `(50 %)`, the triple bonded carbon is electronegative in nature and this enables the release of `H^(+)` ION form `equiv C-H` bond. However, ethyne is a stronger acid than propyne. This is attributed to the electron releasing `+ I` effect of the methyl group which tends to increase the electron density on the triple bonded carbon atom is propyne. the release of `H^(+)` ion from propyne is more difficult than from ethyne or it is a weaker acid than ethyne. 
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