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Step 1: Understanding the ReactionThe reaction involves cyclohexanone, which is a ketone, and dimethylamine, which is a secondary amine. When these two react in the presence of a catalytic amount of acid, they can form an enamine. This reaction typically occurs when water is continuously removed from the reaction mixture, driving the equilibrium towards the formation of the enamine.Step 2: Mechanism of FormationThe mechanism begins with the nucleophilic attack of the dimethylamine on the carbonyl carbon of cyclohexanone. This forms a tetrahedral intermediate. The next step involves the elimination of water (dehydration), which is facilitated by the presence of acid. The removal of water shifts the equilibrium towards the formation of the enamine.Step 3: Final ProductThe final product is an enamine, which is characterized by the presence of a double bond between a carbon atom and a nitrogen atom. In this case, the nitrogen is part of the dimethylamine that reacted with cyclohexanone. Enamines are important intermediates in organic synthesis and can be further transformed into various functional groups.ConclusionThus, the compound formed from the reaction of cyclohexanone with dimethylamine in the presence of acid, when water is continuously removed, is known as an enamine.
