Ester vs. Carbonyl — What's the Difference?

An ester is a chemical compound derived from an acid (organic or inorganic) in which at least one –OH hydroxyl group is replaced by an –O– alkyl (alkoxy) group, as in the substitution reaction of a carboxylic acid and an alcohol. Glycerides are fatty acid esters of glycerol; they are important in biology, being one of the main classes of lipids and comprising the bulk of animal fats and vegetable oils.

The bivalent group C＝O.

Any of a class of compounds derived from an oxyacid, usually resulting from the reaction of an oxyacid and an alcohol with the elimination of water.

A metal compound, such as Ni(CO)4, containing the CO group.

(organic compound) A compound most often formed by the condensation of an alcohol and an acid, with elimination of water, which contains the functional group carbon-oxygen double bond (i.e., carbonyl) joined via carbon to another oxygen atom.

(organic chemistry) In organic chemistry, a divalent functional group, (-CO-), characteristic of aldehydes, ketones, carboxylic acids, amides, carboxylic acid anhydrides, carbonyl halides, esters and others.

An ethereal salt, or compound ether, consisting of an organic radical united with the residue of any oxygen acid, organic or inorganic; thus the natural fats are esters of glycerin and the fatty acids, oleic, etc.

(inorganic chemistry) Any compound of a metal with carbon monoxide, such as nickel carbonyl, Ni(CO)₄.

Formed by reaction between an acid and an alcohol with elimination of water

The radical (CO)´´, occuring, always combined, in many compounds, as the aldehydes, the ketones, urea, carbonyl chloride, etc.

A compound containing metal combined with carbon monoxide

Relating to or containing the carbonyl group