What is the IUPAC name for the compound with the formula CH3-CH(CH3)-CH2-CHO?

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Question: What is the IUPAC name for the compound with the formula CH3-CH(CH3)-CH2-CHO?

Options:

Correct Answer: 2-Methylbutanal

Solution:

The longest chain has 4 carbons with an aldehyde functional group, and a methyl group on the second carbon, hence 2-Methylbutanal.

What is the IUPAC name for the compound with the formula CH3-CH(CH3)-CH2-CHO?

What is the IUPAC name for the compound with the formula CH3-CH(CH3)-CH2-CHO?

Step 1: Identify the longest carbon chain in the compound. The formula CH3-CH(CH3)-CH2-CHO has a chain of 4 carbon atoms.
Step 2: Determine the functional group. The 'CHO' at the end indicates that this compound has an aldehyde functional group.
Step 3: Number the carbon chain. Start numbering from the end closest to the aldehyde group. This gives us the following numbering: 1 (CHO), 2 (CH2), 3 (CH), 4 (CH3).
Step 4: Identify any substituents. There is a methyl group (CH3) attached to the second carbon.
Step 5: Combine the information. The longest chain has 4 carbons (butane) and a methyl group on the second carbon, making it 2-Methyl. Since it has an aldehyde, the full name is 2-Methylbutanal.

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