Question

How many structural isomers of heptane exist?

A) 2
B) 4
C) 6
D) 8
E) 9

Answer 1

The number of structural isomers of heptane is 9.

Step-by-step explanation:

The number of structural isomers of heptane is 9.

In organic chemistry, structural isomers are compounds that have the same molecular formula but different structural arrangements. Heptane is a hydrocarbon with the molecular formula C7H16, and it can exist in different structural isomeric forms. The nine structural isomers of heptane are:

1. n-heptane

2. 2-methylhexane

3. 3-methylhexane

4. 2,2-dimethylpentane

5. 2,3-dimethylpentane

6. 2,4-dimethylpentane

7. 3,3-dimethylpentane

8. 3-ethylpentane

9. 2,2,3-trimethylbutane