Question

The correct IUPAC name of the product is:

• A. 1-acetyl-2-methylcyclohexene
• B. (2-methylcyclohex-1-enyl)ethanone
• C. cyclo-oct-2-en-1-one
• D. 2-cycloocten-1-one

Hint:

When naming compounds with functional groups like carbonyl groups, ensure you note the position of the alkene and the substitution patterns on the cyclohexene ring.

Answer 1

The Correct Option is B

Step 1: Understand the structure of the reactant.
The reactant in question is a compound with a cyclohexene ring attached to an acetyl group (\( \text{COCH}_3 \)) at position 2 and a hydroxyl group (-OH) at position 3 of the ring.
This compound is undergoing a reaction with OH\(^-\) (basic conditions) and H\(^+\) with heat (\(\Delta\)), which is indicative of a dehydration reaction.
Step 2: Analyze the reaction condition.
Under these conditions, the hydroxyl group (-OH) is eliminated from the ring, resulting in the formation of a double bond (alkene) at position 1.
This reaction also results in the formation of a conjugated system.
Step 3: Naming the product.
The product is a substituted cyclohexene, where the methyl group is attached to position 2, and the double bond is formed at position 1 of the cyclohexene ring.
The acetyl group (\( \text{COCH}_3 \)) remains at position 3, making the IUPAC name (2-methylcyclohex-1-enyl)ethanone.