Answer
The more common name for the ( 2-methylpropyl ) group is: Isobutyl group.
Work Step by Step
1. Write the biggest carbon chain, and number its carbons:
- It is: "Propyl", so we must draw this chain: $^1CH_3 - ^2CH_2 - ^3CH_2 - $
2. Now, add the other group:
- Since it is represented by: "2-methyl", we should attach a methyl group ($CH_3-$) to the second carbon of the chain, which will lose a hydrogen to do such thing.
3. Finally, name it properly:
- As we can see at the top of page 92, ( 2-methylpropyl ) is a "Isobutyl Group"
