-Alkenes Ethene(ethylene)is a major industrial feedstock Used in the production of ethanol,ethylene oxide and the polymer polyethylene Ethene Propene(propylene)is also very important in industry Molecular formula C3H6 Used to make the polymer polypropylene and is the starting material for acetone Many alkenes occur naturally B-Pinene An aphid alarm pheromone (a component of turpentine)2 – Alkenes • Ethene (ethylene) is a major industrial feedstock – Used in the production of ethanol, ethylene oxide and the polymer polyethylene • Propene (propylene) is also very important in industry – Molecular formula C3H6 – Used to make the polymer polypropylene and is the starting material for acetone • Many alkenes occur naturally