Alkyne xrightarrow[{Hg^{2+}}]{{H^+/H_2O}} tex | vedclass

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(C) The hydration of alkynes in the presence of $Hg^{2+}$ and $H^+/H_2O$ (Kuccherov reaction) follows Markovnikov's addition of water to the triple bo

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$HC \equiv CH$

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(C) The hydration of alkynes in the presence of $Hg^{2+}$ and $H^+/H_2O$ (Kuccherov reaction) follows Markovnikov's addition of water to the triple bond.$1$. For terminal alkynes like $CH_3-C \equiv CH$,the reaction yields a ketone $(CH_3-CO-CH_3)$.$2$. For internal alkynes like $CH_3-C \equiv C-CH_3$ or $CH_3-C \equiv C-CH_2CH_3$,the reaction yields ketones.$3$. For ethyne $(HC \equiv CH)$,the hydration product is ethenol $(CH_2=CH-OH)$,which tautomerizes to form ethanal $(CH_3-CHO)$,an aldehyde,not a ketone.Therefore,$HC \equiv CH$ cannot give a ketone.

$Alkyne \xrightarrow[{Hg^{2+}}]{{H^+/H_2O}} \text{ketone}$
Which of the following alkynes cannot give a ketone?

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$Alkyne \xrightarrow[{Hg^{2+}}]{{H^+/H_2O}} \text{ketone}$Which of the following alkynes cannot give a ketone?