IUPAC Name of C₈H₁₈ | 4-methylheptane
What is the IUPAC name of C₈H₁₈?
The IUPAC name of C₈H₁₈ is 4-methylheptane. It is a alkane with a 7-carbon parent chain (heptane) with a methyl at position 4 substituent.
| Formula | C₈H₁₈ |
| IUPAC Name | 4-methylheptane |
| Compound Class | Alkane |
| Parent Chain | heptane (7 carbons) |
| Substituents | methyl at C4 |
| Difficulty | Intermediate |
Step 1: Identify the Parent Chain
The longest continuous carbon chain in C₈H₁₈ contains 7 carbon atoms, giving the parent name heptane.
Step 2: Number and Name Substituents
Number the parent chain so that substituents receive the lowest possible locants. 4-methylheptane has one substituent:
- methyl 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-methylheptane.
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