91Ó°ÊÓ

Alkyneundergo hydration in the presence of mercury(II) sulfate. The reaction occurs with Markovnikov regiochemistry, so the OH group adds to the more highly substituted carbon and the H attaches to the less highly substituted one.

Enol is an intermediate in the reaction, which rearranges into a ketone by a process called keto–enol tautomerism. The individual keto and enol forms are said to be tautomers.

The formation of the single product shows alkyne is symmetrical.

The reaction occurs with Markovnikov regiochemistry. Enol is an intermediate in the reaction, which rearranges into a ketone by a process called keto-enol tautomerism.

The formation of the two products shows alkyne is unsymmetrical.

The reaction occurs with Markovnikov regiochemistry. Enol is an intermediate in the reaction, which rearranges into a ketone by a process called keto-enol tautomerism