IUPAC name of the following compound (P) is:
General Organic Chemistry (GOC) · Class 11 · JEE Main Previous Year Question
IUPAC name of the following compound (P) is:
- a
1-Ethyl-5,5-dimethylcyclohexane
- b✓
3-Ethyl-1,1-dimethylcyclohexane
- c
1-Ethyl-3,3-dimethylcyclohexane
- d
1,1-Dimethyl-3-ethylcyclohexane
3-Ethyl-1,1-dimethylcyclohexane
IUPAC Nomenclature Rules for Cyclic Compounds:
- Identify the parent ring (cyclohexane)
- Number the ring to give substituents the lowest possible locants
- List substituents in alphabetical order (ignoring prefixes like di-, tri-)
- Use commas between numbers, hyphens between numbers and words
Step 1: Identify substituents
- Two methyl groups (gem-dimethyl)
- One ethyl group
Step 2: Alphabetical order
- Ethyl comes before Methyl alphabetically
Step 3: Numbering Follow the lowest set of locants rule
- Position 1: Two methyl groups (gem-dimethyl → 1,1-dimethyl)
- Position 3: Ethyl group
Step 4: IUPAC Name IUPAC name: 3-Ethyl-1,1-dimethylcyclohexane
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