MCQ
- A1-Bromo-2-ethyl-2-methylethane
- ✓1-Bromo-2-methylbutane
- C2-Methyl-1-bromobutane
- D1-Bromo-2-ethylpropane
✓
Answer
Correct option: B.
1-Bromo-2-methylbutane
(b) 1-Bromo-2-methylbutane
Explanation: First, we need to identify the longest carbon chain. Once we do that, the actual structure should read $CH _3- CH _2$ $- CH \left( CH _3\right)- CH _2- Br$. - Br , the functional halide group is attached to the first carbon atom (1- Bromo), so we start the numbering from that position. The methyl group branch is bond to the second carbon atom in the chain(2-methyl). The number of carbons in the unbranched parent chain is four, thus giving the name butane. The IUPAC is named 1-Bromo-2methylbutane.
Explanation: First, we need to identify the longest carbon chain. Once we do that, the actual structure should read $CH _3- CH _2$ $- CH \left( CH _3\right)- CH _2- Br$. - Br , the functional halide group is attached to the first carbon atom (1- Bromo), so we start the numbering from that position. The methyl group branch is bond to the second carbon atom in the chain(2-methyl). The number of carbons in the unbranched parent chain is four, thus giving the name butane. The IUPAC is named 1-Bromo-2methylbutane.
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