JEE Mains · Chemistry · STD 12 -8.1. Aldehydes and ketones
Which one of the following carbonyl compounds cannot be prepared by addition of water on an alkyne in the presence of \(HgSO _{4}\) and \(H _{2} SO _{4}\) ?
- A \(\begin{array}{*{20}{c}} {\,\,\,\,\,\,O} \\ {\,\,\,\,\,\,||} \\ {C{H_3} - C - H} \end{array}\)
- C \(\begin{array}{*{20}{c}} {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O} \\ {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||} \\ {C{H_3} - C{H_2} - C - H} \end{array}\)
- D \(\begin{array}{*{20}{c}} {O\,\,\,\,\,\,\,\,\,} \\ {||\,\,\,\,\,\,\,\,\,\,} \\ {C{H_3} - C - C{H_2}C{H_3}} \end{array}\)
Answer & Solution
Correct Answer
(C) \(\begin{array}{*{20}{c}} {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O} \\ {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||} \\ {C{H_3} - C{H_2} - C - H} \end{array}\)
Step-by-step Solution
Detailed explanation
Reaction of \(HgSO _{4} / dil H _{2} SO _{4}\) with alkyne gives addition of water as per markonikoff's rule. \((1)\) \(HC \equiv CH\) \(\xrightarrow[{{H_2}S{O_4}}]{{HgS{O_4}}}\)…
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