sentence: Ketones have the formyl group in the middle of the molecule.
sentences_before: The group without the side chain is called the 'aldehyde group' or 'formyl group'. Aldehydes are different from ketones because the formyl group is at the end of the molecule in an aldehyde.
sentences_after: Aldehydes are common in organic chemistry.
concept_name: ketone
headings: Aldehyde
categories: Organic compounds Functional groups