Question

What are the structural isomers of C9H20?

Answer 1

According to James Richard Fromm, there are 35 structural isomers of `C_9H_20` (Nonane).

Explanation:

They are as follows:

Nonane
2-methyloctane
3-methyloctane
4-methyloctane
2,2-dimethylheptane
2,3-dimethylheptane
2,4-dimethylheptane
2,5-dimethylheptane
2,6-dimethylheptane
3,3-dimethylheptane
3,4-dimethylheptane
3,5-dimethylheptane
4,4-dimethylheptane
3-ethylheptane
4-ethylheptane
2,2,3-trimethylhexane
2,2,4-trimethylhexane
2,2,5-trimethylhexane
2,3,3-trimethylhexane
2,3,4-trimethylhexane
2,3,5-trimethylhexane
2,4,4-trimethylhexane
3,3,4-trimethylhexane
2-methyl-3-ethylhexane
2-methyl-4-ethylhexane
3-methyl-3-ethylhexane
3-methyl-4-ethylhexane
2,2,3,3-tetramethylpentane
2,2,3,4-tetramethylpentane
2,2,4,4-tetramethylpentane
2,3,3,4-tetramethylpentane
2,2-dimethyl-3-ethylpentane
2,3-dimethyl-3-ethylpentane
2,4-dimethyl-3-ethylpentane
3,3-diethylpentane

Taken from: http://www.3rd1000.com/chem301/nonane.htm

Hope this helps :)