The correct statement regarding a carbonyl compound with a hydrogen atom on its alpha carbon, is:
(1)A carbonyl compound with a hydrogen atom on its alpha-carbon never equilibrates with its corresponding enol.
(2)A carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as aldehyde-ketone equilibration.
(3)A carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as carbonylation.
(4)A carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as keto-enol tautomerism.Correct
Answer: (4)
Solution
A carbonyl compound having an -hydrogen exists in rapid equilibrium with its enol form: . This type of constitutional isomerism,
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