Which of the following is the correct IUPAC name for CH3-CH2-CH(CH3)-CH2-CH3?
Practice Questions
1 question
Q1
Which of the following is the correct IUPAC name for CH3-CH2-CH(CH3)-CH2-CH3?
2-Pentene
3-Pentene
2-Methylbutane
3-Methylbutane
The longest carbon chain has 5 carbons, and there is a methyl group on the second carbon, making it 2-Methylbutane.
Questions & Step-by-step Solutions
1 item
Q
Q: Which of the following is the correct IUPAC name for CH3-CH2-CH(CH3)-CH2-CH3?
Solution: The longest carbon chain has 5 carbons, and there is a methyl group on the second carbon, making it 2-Methylbutane.
Steps: 6
Step 1: Identify the carbon chain in the molecule CH3-CH2-CH(CH3)-CH2-CH3.
Step 2: Count the number of carbon atoms in the longest chain. There are 5 carbon atoms.
Step 3: Determine the name of the longest chain. A 5-carbon chain is called 'pentane'.
Step 4: Look for any branches (substituents) on the main chain. There is a methyl group (CH3) attached to the second carbon.
Step 5: Combine the information: The main chain is 'pentane' and there is a methyl group on the second carbon, so the name is '2-Methylpentane'.
Step 6: Write the final IUPAC name as '2-Methylbutane' since the longest chain is actually 4 carbons (butane) with a methyl group on the second carbon.
