Ethyne on reaction with dil. H_2SO_4 and Hg(I | vedclass

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Question

(B) The reaction of ethyne with dilute $H_2SO_4$ in the presence of $Hg(II)$ salts (like $HgSO_4$) is a hydration reaction. The reaction proceeds as f

Vedclass · Accepted Answer

Ethanal

Vedclass · Answer

(B) The reaction of ethyne with dilute $H_2SO_4$ in the presence of $Hg(II)$ salts (like $HgSO_4$) is a hydration reaction. The reaction proceeds as follows: $CH \equiv CH + H_2O$ $\xrightarrow{40\% \ H_2SO_4, \ 1\% \ HgSO_4} [CH_2 = CH - OH] 	ext{ (vinyl alcohol)} [CH_2 = CH - OH]$ $\xrightarrow{	ext{tautomerization}} CH_3 - CHO 	ext{ (ethanal)}$ Thus,the final product is ethanal.

Ethyne on reaction with dil. $H_2SO_4$ and $Hg(II)$ gives:

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