How do you determine the number of structural isomers?

1 Answer
Mar 2, 2017

How else but by trial and error.......??

Explanation:

Butane can support 2 structural isomers.

Pentane can support 3 structural isomers.

Hexane can support 5 structural isomers.

Heptane can support 9 structural isomers.

Even as an undergraduate, you would not be expected to know and represent all the structural isomers of hexane. You would be expected to be able to name a given isomer, and so differentiate between identical structures and isomers of a given formula.