Write all isomers of pentane (C5H12)

Let’s write down all the isomers of pentane (C5H12). Pentane belongs to the class of alkanes, which means that there will be single bonds everywhere.
1. First, write down pentane.
CH3 – CH2 – CH2 – CH2 – CH2.
Next, we write down the isomer.
CH3 – CH – CH2 – CH3
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CH3
This isomer is called 2-methylbutane.
CH3
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CH3 – C – CH3
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CH3
This isomer is called 2,2-dimethylpropane.
That is, the isomers have the same qualitative and quantitative composition, but differ in structure.