Carbonyl group

It is common to several classes of organic compounds (such as aldehydes, ketones and carboxylic acid), as part of many larger functional groups.

The remainder of this article concerns itself with the organic chemistry definition of carbonyl, such that carbon and oxygen share a double bond.

In organic chemistry, a carbonyl group characterizes the following types of compounds: Other organic carbonyls are urea and the carbamates, the derivatives of acyl chlorides, chloroformates and phosgene, carbonate esters, thioesters, lactones, lactams, hydroxamates, and isocyanates.

[3] Substituents can affect carbonyl groups by addition or subtraction of electron density by means of a sigma bond.

A variety of nucleophiles attack, breaking the carbon-oxygen double bond, and leading to addition-elimination reactions.