CH2CCH3COOR

CH2CCH3COOR is a condensed structural formula that denotes an ester. In this representation, a carbonyl group is bonded to an alkoxy group OR' and to an alkyl or substituted alkyl fragment CH2CCH3. However, as written it does not uniquely specify connectivity or stereochemistry; several constitutional isomers could match the formula depending on how the CH2CCH3 fragment is attached to the carbonyl carbon. Consequently, CH2CCH3COOR is not a single, unambiguous compound without additional structural information.

Esters have the general formula R-CO-OR' and are common functional groups in organic chemistry. They are typically formed by condensation of a carboxylic acid and an alcohol (Fischer esterification) or by reaction of acyl derivatives (such as acid chlorides or anhydrides) with alcohols. The same functional group can be involved in hydrolysis, transesterification, or reduction to give a variety of products. The exact properties of a given ester depend strongly on the identities of R and R'.

Synthesis and transformations of esters are central to organic synthesis. Typical routes include acid-catalyzed esterification, base- or acid-catalyzed transesterification, and conversion of carboxylic acids to esters via coupling reagents. Esters can be hydrolyzed back to carboxylic acids and alcohols under acidic or basic conditions, and some esters serve as precursors for polymers, fragrances, solvents, and plasticizers.

Safety and handling depend on the specific ester. Esters are often flammable liquids with varying volatility and odor; standard laboratory precautions apply, including proper ventilation and avoidance of inhalation or contact with skin.