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Unformatted text preview: Carvone Hydrogenation/Dehydrogenation Lab Report (10-13-07) Norbert Wang Section 113 1) Palladium on carbon with H 2 hydrogenates alkenes. Carvone has a terminal alkene. However there is no H 2 added to the system. Palladium on carbon in the absence of H 2 is strong enough to find H 2 sources from other molecules in the system. By looking at Carvone in its enol form a two double bonds are observed in the six-membered ring. Fortunately enough, palladium is strong enough to dehydrate two hydrogens from the ring resulting in the formation of benzene. The resonance stability of benzene drives the reaction forward. Therefore the two hydrogens removed are added to the terminal alkene to form a normal alkane. Finally the reaction only involves solely the Carvone molecule and palladium on carbon. 2) A benzene was essentially formed in this reaction and a terminal alkene was hydrogenated. The heat of hydrogenation of benzene is -206 kJ/mol. The heat of hydrogenation of 1,3-The heat of hydrogenation of benzene is -206 kJ/mol....
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- Spring '08