Chemistry · Aldehydes and Ketones
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Which of the following is an aromatic aldehyde?
- A
Acetaldehyde
- B
Propanal
- C
Benzaldehyde
- D
Cyclohexanone
An aromatic aldehyde is a compound where an aldehyde functional group (-CHO) is attached directly to an aromatic ring. Benzaldehyde fits this description perfectly.
Acetaldehyde is an aliphatic aldehyde, not aromatic. Its IUPAC name is ethanal, which indicates that it has two carbon atoms and a carbonyl group at the end of the carbon chain.
Propanal is another aliphatic aldehyde. It has a three-carbon chain and is named according to IUPAC conventions as a straight-chain aldehyde. Its IUPAC name is propanal, not aromatic.
Benzaldehyde is the correct answer as it is an aromatic aldehyde. It has a benzene ring directly attached to the carbonyl group, making it fit the definition of an aromatic compound.
Cyclohexanone is a cyclic ketone and does not contain an aldehyde functional group. It is not aromatic, as it does not have a benzene ring. Its IUPAC name indicates a ketone functional group.
Tagged under Chemistry · Aldehydes and Ketones · 2022