enone

An enone, also called an a,ß-unsaturated carbonyl, is a type of organic compound consisting of an alkene conjugated to a ketone. The simplest enone is methyl vinyl ketone (butenone) or CH₂=CHCOCH₃. An enal is the corresponding a,ß-unsaturated aldehyde, an example being acrolein (CH₂=CHCHO).