Question

IUPAC name of CH{3–CH(CH3)–CHO is —}

• A. Butanal
• B. Butanol
• C. 2-Methyl propanal
• D. 2-Methyl propanol

Hint:

For aldehydes, always include the –CHO group in the main chain and number the chain from that end.

Answer 1

The Correct Option is C

Step 1: Identify the functional group.
The given compound contains an \(-CHO\) group, which is an aldehyde functional group. Hence, the suffix will be “–al”.
Step 2: Select the parent chain.
The longest chain containing the –CHO group has three carbon atoms (propane chain). Thus, the base name is “propanal”.
Step 3: Identify the substituent.
There is a methyl group (–CH3) attached to the second carbon atom.
Step 4: Combine the name.
Adding the substituent’s position gives the name 2-Methyl propanal.
Step 5: Conclusion.
Therefore, the correct IUPAC name of CH3–CH(CH3)–CHO is 2-Methyl propanal.