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

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

Options:

Correct Answer: 2-Methylbutanal

Solution:

The longest chain has four carbons with an aldehyde group, and the methyl group is on the second carbon, making it 2-Methylbutanal.

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

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

Step 1: Identify the longest carbon chain in the compound. Count the number of carbon atoms in the chain.
Step 2: The longest chain has 4 carbon atoms, which is called butane.
Step 3: Determine the functional group present. The compound has an aldehyde group (-CHO) at the end of the chain.
Step 4: Since the aldehyde group is present, the name will end with 'anal', making it butanal.
Step 5: Look for any substituents (branches) on the longest chain. There is a methyl group (CH3) on the second carbon.
Step 6: Combine the information: The longest chain is butanal, and there is a methyl group on the second carbon, making it 2-Methylbutanal.

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