IUPAC Name of C₉H₂₀ | 4-ethyl-2-methylhexane
What is the IUPAC name of C₉H₂₀?
The IUPAC name of C₉H₂₀ is 4-ethyl-2-methylhexane. It is a alkane with a 6-carbon parent chain (hexane) with substituents: methyl at position 2, ethyl at position 4.
| Formula | C₉H₂₀ |
| IUPAC Name | 4-ethyl-2-methylhexane |
| Compound Class | Alkane |
| Parent Chain | hexane (6 carbons) |
| Substituents | methyl at C2, ethyl at C4 |
| Difficulty | Advanced |
Step 1: Identify the Parent Chain
The longest continuous carbon chain in C₉H₂₀ contains 6 carbon atoms, giving the parent name hexane.
Step 2: Number and Name Substituents
Number the parent chain so that substituents receive the lowest possible locants. 4-ethyl-2-methylhexane has 2 substituents:
- methyl at carbon 2
- ethyl at carbon 4
Step 3: Assemble the IUPAC Name
Combine the substituent locants and names (in alphabetical order) as prefixes to the parent chain name. If two or more identical substituents are present, use the multiplying prefixes di-, tri-, tetra-, etc. The complete IUPAC name is 4-ethyl-2-methylhexane.
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