# What are the molecular formula, the structural formula, the condensed structural formula, and the abbreviated line formula for pentane?

Feb 4, 2015

The name pentane can be used for any of the three structural isomers that share the molecular formula ${C}_{5} {H}_{12}$. In IUPAC nomenclature however the term pentane is used exclusively for n-pentane, the unbranched isomer of the group.

The molecular formula of pentane, or n-pentane, is ${C}_{5} {H}_{12}$.

The structural formula will be $C {H}_{3} C {H}_{2} C {H}_{2} C {H}_{2} C {H}_{3}$.

The condensed structural formula will be $C {H}_{2} {\left(C {H}_{2}\right)}_{3} C {H}_{3}$.

The skeletal structure, also called bond-line notation, for n-pentane will be

Pentane's two other isomers are called isopentane (or 2-methylbutane)

and neopentane (or 2,2-dimethylpropane)