The key difference between aromatic and aliphatic aldehydes is that the aromatic aldehydes have their aldehyde functional group attached to an aromatic group whereas the aliphatic aldehydes do not have their aldehyde functional group attached to an aromatic group.
Aldehydes are organic compounds having the functional group –CHO. Therefore, it has a carbonyl center (-C=O). The general formula of an aldehyde is R-CHO in which R group can be either aromatic or aliphatic. Hence, this R group determines the reactivity of this organic molecule. Aromatic aldehydes are less reactive than aliphatic aldehydes.
