What is the IUPAC name for the compound with the formula C2H5-CO-CH3?

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Question: What is the IUPAC name for the compound with the formula C2H5-CO-CH3?

Options:

Correct Answer: Butan-2-one

Solution:

The compound has a ketone functional group with 4 carbons, making it Butan-2-one.

What is the IUPAC name for the compound with the formula C2H5-CO-CH3?

What is the IUPAC name for the compound with the formula C2H5-CO-CH3?

Step 1: Identify the molecular formula of the compound, which is C2H5-CO-CH3.
Step 2: Break down the formula: C2H5 is an ethyl group, CO is a carbonyl group (part of a ketone), and CH3 is a methyl group.
Step 3: Count the total number of carbon atoms in the compound: 2 (from C2H5) + 1 (from CO) + 1 (from CH3) = 4 carbon atoms.
Step 4: Determine the functional group: The presence of the carbonyl (C=O) indicates that this compound is a ketone.
Step 5: Identify the position of the carbonyl group: The carbonyl is between the ethyl and methyl groups, making it a 2-ketone.
Step 6: Name the compound based on the number of carbon atoms and the position of the carbonyl: With 4 carbons and the carbonyl on the second carbon, the IUPAC name is Butan-2-one.

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