Alkene Reactions

Alkene Reactions


  1. Hydrogenation – Addition by hydrogen. Alkanes are formed when the H2 adds to the alkene molecule. A catalyst of nickel or platinum is used at a temperature of about 150 °C g.

CH2 = CH2 + H2 -> CH3CH3

  1. Halogenation – Addition of bromine or other halogens. Halogen alkenes are formed when halogens attach to the carbons in the double bond by covalent bonds g.

CH2 = CH2 + Br2 -> CH2BrCH2Br

  1. Hydration – Addition of water. Alcohols form when water is added to alkene molecules. A catalyst of dilute H2SO4 or H3PO4 is

CH2 = CH2  + H2O -> CH3–CH2–OH



Number of Carbons Alkane Alkene Alcohol Carboxylic Acids
1 Methane Methanol Methanoic Acid
2 Ethane Ethene Ethanol Ethanoic Acid
3 Propane Propene Propanol Propanoic Acid
4 Butane Butene Butanol Butanoic Acid
5 Pentane Pentene Pentanol Pentanoic Acid
6 Hexane Hexene Hexanol Hexanoic Acid
7 Heptane Heptene Heptanol Heptanoic Acid
8 Octane Octene Octanol Octanoic Acid
9 Nonane Nonene Nonanol Nonanoic Acid
10 Decane Decene Decanol Decanoic Acid