gcsescience.com                                                          14                                                          gcsescience.com

Products from Oil

Structure of Alkene Hydrocarbons.

Alkenes form an homologous series with the general formula CnH2n.

Methene, CH2, does not exist. Butene, C4H8, has n=4.
Ethene, C2H4, has n=2. Pentene, C5H10, has n=5.
Propene, C3H6, has n=3. Hexene, C6H12, has n=6.

Below are links to the structure of alkenes. Some of these exist as isomers.

Ethene          Propene

Butene       Pentene       Hexene

Alkenes are hydrocarbons which have at least one double bond
between two of the carbon atoms.
They do not have the maximum number of hydrogen atoms
for the number of carbon atoms present (two less than the same alkane)
and so alkenes are called unsaturated hydrocarbons.

back       Headings       Hydrocarbons       Search       Questions       next

gcsescience.com     Contents     The Periodic Table     Index     Quizzes    gcsescience.com

Copyright © 2008 Dr. Colin France. All Rights Reserved.