Reaction::valign    Group::aldehyde    Alcohol::carbon    Reagent::which    Carbonyl::addition    Named::organic

An aldehyde.
Formaldehyde, the simplest aldehyde

An aldehyde {{#invoke:IPAc-en|main}} or alkanal is an organic compound containing a formyl group. The formyl group is a functional group, with the structure R-CHO, consisting of a carbonyl center (a carbon double bonded to oxygen) bonded to hydrogen and an R group,<ref>IUPAC Gold Book aldehydes</ref> which is any generic alkyl or side chain. The group without R is called the aldehyde group or formyl group. Aldehydes differ from ketones in that the carbonyl is placed at the end of a carbon skeleton rather than between two carbon atoms. Aldehydes are common in organic chemistry. Many fragrances are aldehydes.

Aldehyde sections
Intro  Structure and bonding  Nomenclature  Physical properties and characterization  Applications and occurrence   Dialdehydes   Examples of Aldehydes  Examples of Dialdehydes  Uses   See also   References  External links  

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