# Question #50a50

Jul 11, 2017

#### Answer:

No. Butane is smaller than pentane, so it has only two isomers. $n$-butane and isobutane are all there is.

#### Explanation:

Once you start getting isomers with butane, the number of isomers grows exponentially fast with the size of the alkane. See for instance http://www.mathe2.uni-bayreuth.de/sascha/oeis/alkane.html.