Question

The IUPAC name of ($CH_3-CH_2-CHO$) is:

• A. Propanone
• B. Propanal
• C. Propanoic acid
• D. Ethanol

Hint:

Don't forget to count the carbon atom that is part of the functional group! In $CH_3CH_2CHO$, the $C$ in $CHO$ is the 1st carbon.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
IUPAC nomenclature follows a set of rules to name organic compounds based on the longest carbon chain containing the principal functional group.
Step 2: Detailed Explanation:
1. Identify the functional group: The group \(-CHO\) represents an aldehyde.
2. Count the longest carbon chain: The chain has 3 carbon atoms (including the carbon in the aldehyde group). The root word for 3 carbons is "prop".
3. Identify the saturation: Since there are only single bonds between the carbons in the chain, the primary suffix is "an".
4. Add the secondary suffix: For aldehydes, the secondary suffix is "al".
5. Combine: Prop + an + al = Propanal.
Note: Propanone is a ketone (3 carbons), Propanoic acid has a \(-COOH\) group, and Ethanol is a 2-carbon alcohol.
Step 3: Final Answer:
The IUPAC name of the given compound is Propanal.