All the names of aldehydes end in –al. The simplest aldehydes are methanal (also known as formaldehyde), HCHO, and ethanal (acetaldehyde), CH3CHO.
Many aldehydes occur in nature and are often responsible for the flavor and scent of animals and plants. Aldehydes are highly reactive, and find many uses in industry in the preparation of solvents, dyes, resins, and other compounds. Aromatic aldehydes, such as benzaldehyde and vanillin, are used in dyes and as perfumes and food flavorings.
Chemistry of aldehydes
Aldehydes have certain characteristic addition reactions and condensation reactions. With sodium hydrogen sulfate (IV) they form addition compounds of the type [RCOH(SO3)H]- Na+, formerly known as bisulfite addition compounds. They also form addition compounds with hydrogen cyanide to give cyanohydrins and with alcohols to give acetals and undergo condensation reactions to yield oximes, hydrazones, and semicarbazones. Aldehydes readily polymerize.
See also ketones.
Related category• ORGANIC CHEMISTRY
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