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Pentanol - Isomers.

There are different isomers of the alcohols propanol, butanol and pentanol.
The eight isomers of pentanol are shown below.

Pentanol (C₅H₁₁OH) is commonly represented by the molecule pentan-1-ol,
a primary alcohol, which has the structural formula

Other isomers of pentanol can be drawn by changing the way that the
O–H group is joined to the molecule  or by changing the way that
the carbon atoms are joined to each other (see isomers of pentane).

The other isomers of pentanol are pentan-2-ol, a secondary alcohol,
represented by the structural formula

pentan-3-ol, a secondary alcohol,
represented by the structural formula

2-methylbutan-1-ol, a primary alcohol,
represented by the structural formula

3-methylbutan-1-ol, a primary alcohol,
represented by the structural formula

2-methylbutan-2-ol, a tertiary alcohol,
represented by the structural formula

2-methylbutan-3-ol (or 3-methylbutan-2-ol) a secondary alcohol,
represented by the structural formula

2,2-dimethylpropanol, a primary alcohol,
represented by the structural formula

The single lines between the atoms represent single covalent bonds.

Note that each carbon atom has four bonds (valency 4),
each oxygen atom has two bonds (valency 2)
and each hydrogen atom has one bond (valency 1).
Valency is the combining power of an atom.

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