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Pentane is the unbranched “straight chain” isomer of C5H12. The other two isomers are branched:
- 2-methylbutane has one branch
- 2,2-dimethylpropane has two branches.
Each of these branches contains one carbon atom and is a methyl group, —CH3.
Structural and displayed formulae
A structural formula shows the number of atoms of each element in a molecule, and their positions in the molecule.
A displayed formula shows the same information as a structural formula, but in addition it shows the bonds between the atoms.
|Name of alkane||Structural formula||Displayed formula|