The correct IUPAC nomenclature for the following compound is:
General Organic Chemistry (GOC) · Class 11 · JEE Main Previous Year Question
The correct IUPAC nomenclature for the following compound is:
- a
5-Formyl-2-methylhexanoic acid
- b✓
2-Methyl-5-oxohexanoic acid
- c
2-Formyl-5-methylhexan-6-oic acid
- d
5-Methyl-2-oxohexan-6-oic acid
2-Methyl-5-oxohexanoic acid
Step 1: Identify Principal Group and Longest Chain The principal functional group is the carboxylic acid (), so the carbon chain is numbered starting from this group. The longest chain containing the carbonyl group has 6 carbons → Hexanoic acid.
Step 2: Numbering and Substituents
- C1:
- C2: Has a methyl group.
- C5: The ketone oxygen is treated as a substituent called "oxo". Substituents: 2-methyl and 5-oxo.
Step 3: IUPAC Name Arrange substituents alphabetically: 2-Methyl-5-oxohexanoic acid.
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