Question

Question: Which of the following is not another representation for 2-methylbutane?

a.

b.

c.

d.

Short answer

Answer

Compound d does not represent the structure of 2-methylbutane.

Step-by-step solution

2-Methylbutane

2-Methylbutane has a chain of four carbon atoms. The second position is occupied by the methyl group.

If the longest chain does not contain any functional group, counting can be started from any side. In either case, the same structure is obtained.

Explanation

1. In the given compound, a chain of four carbon atoms with the methyl group at the second position is present. Therefore, it is the structure of 2-methylbutane.
2. In the given compound, a chain of four carbon atoms with the methyl group at the second position is present. Therefore, it is the structure of 2-methylbutane.
3. In the given compound, a chain of four carbon atoms with the methyl group at the second position is present. Therefore, it is the structure of 2-methylbutane.
4. In this given compound, a chain of four carbon atoms with the methyl group at the first position is present. Therefore, it is not the structure of 2-methylbutane.