When do we use carbaldehyde and -al?
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when the −CHO group is attached to a carbon atom of a ring or ring system, or to a heteroatom
Answer:
We use the term "carbaldehyde" when referring to aldehydes that have a carbonyl group attached to a carbon atom that is also bonded to a hydrogen atom. On the other hand, "-al" is a suffix used to indicate the presence of an aldehyde functional group in a compound. So, we can use "-al" as a suffix when naming compounds that contain an aldehyde group.