In organic chemistry, 1-propenyl (or simply propenyl) has the formula ÷CH=CHâÂÂCH<sub>3</sub> and 2-propenyl (isopropenyl) has the formula CH<sub>2</sub>=(C÷)âÂÂCH<sub>3</sub>. These groups are found in many compounds. Propenyl compounds are isomeric with allyl compounds, which have the formula ÷CH<sub>2</sub>âÂÂCH=CH<sub>2</sub>.
Many phenylpropanoids and their derivatives feature derivatives of propenylbenzene:
Isopropenyl acetate is a 2-propenyl ester, synthesizable from ketene.
Several terpenes feature 2-propenyl substituents: