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How to Draw Isomers of Alkenes.
Changing the position
of the double
bond in an alkene
makes a
different isomer.
Butene and pentene exist as
different isomers.
Compare these with the isomers
of butane and pentane on the previous
pages.
What are the Isomers of Butene?
Butene
(C4H8) is commonly represented by
the
molecule but-1-ene which has
the structural formula
Other isomers of butene can be drawn by
changing the place of
the double bond or by changing
the way that the
carbon atoms are joined to each other.
The other isomers of butene are
but-2-ene
represented by the structural formula
and 2-methylpropene, represented by the structural formula
where the double lines between
the carbon atoms
represent a double
covalent bond.
The single lines represent single covalent
bonds.
Note that each carbon atom has
four bonds
(valency 4),
and each hydrogen atom has one bond
(valency 1).
Valency is the combining power of an atom.
Links Hydrocarbons Revision Questions 
gcsescience.com The Periodic Table Index Hydrocarbons Quiz gcsescience.com
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