Question

Give an example of a compound which has one isopropyl group.

Answer 1

Compound with one isopropyl group:-

1. The simplest structural unit of the isopropyl group is $—\mathrm{CH}{\left({\mathrm{CH}}_3\right)}_2$ that contains a tertiary carbon.
2. With the two methyl$(-{\mathrm{CH}}_3)$ molecules attached to it, the isopropyl has some specific orientation of being attached to the central carbon atom.
3. An example of such a compound is 2-methyl pentane ${\mathrm{CH}}_3-{\mathrm{CH}}_2-{\mathrm{CH}}_2-\mathrm{CH}\left({\mathrm{CH}}_3\right)-{\mathrm{CH}}_3$.
4. Here in this compound, the methyl group is attached to the second carbon atom, thus making the carbon atom tertiary.
5. The structure of 2-methyl pentane is:

Therefore, 2-methyl pentane ${\mathrm{CH}}_3-{\mathrm{CH}}_2-{\mathrm{CH}}_2-\mathrm{CH}\left({\mathrm{CH}}_3\right)-{\mathrm{CH}}_3$ is an example of a compound which has one isopropyl group.