What is the common name of the given compound?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Cinnamaldehyde
The given compound contains:
- A benzene ring
- An α,β-unsaturated aldehyde group (–CH=CH–CHO) attached to the ring.
Thus the structure is:
C₆H₅–CH=CH–CHO
This compound is commonly known as cinnamaldehyde, which is the major component of cinnamon oil.
The IUPAC name of cinnamaldehyde is 3-phenylprop-2-enal.
Option-wise Explanation
Option 1: Phthaldehyde
Incorrect. Phthaldehyde contains two –CHO groups on the benzene ring.
Option 2: Salicylaldehyde
Incorrect. Salicylaldehyde has a –CHO and –OH group attached directly to the benzene ring.
Option 3: Vanillin
Incorrect. Vanillin contains –CHO, –OCH₃, and –OH groups on the benzene ring.
Option 4: Cinnamaldehyde
Correct. The compound C₆H₅–CH=CH–CHO is cinnamaldehyde.
