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What are the Isomers of Pentane?

Pentane (C5H12) has three structural isomers.

Isomer 1 is n-pentane,
the straight chain normal structure for pentane.
n-pentane - Isomer of Pentane

 

Isomer 2 is 2-methylbutane, a branched chain with
a carbon* atom joined onto three other carbon atoms.

2-methylbutane - Isomer of Pentane

 

Isomer 3 is 2,2-dimethylpropane, a branched chain with the
central carbon* atom joined onto four other carbon atoms.
2,2-dimethylpropane - Isomer of Pentane

Note that for all the isomers,
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.
You cannot change the number of bonds
that each atom has, see the isomers of pentane.

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