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A.
2-bromo-3-chlorobutanol
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B.
3-bromo-2-chlorobutanol
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C.
3-chloro-2-bromobutanol
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D.
2-chloro-3-bromobutanol
Correct Answer: Option B
Explanation
The IUPAC name for CH\(_2\)(OH)CH(Cl)CH(Br)CH\(_3\) is 3-bromo-2-chlorobutanol. The molecule is a four-carbon chain (but-) with a hydroxyl group (alcohol) at position 1, a chlorine atom at position 2, and a bromine atom at position 3, ordered alphabetically.
- Longest Chain: Butane (4 carbons).
- Functional Group: Alcohol (
−OH) takes precedence, starting numbering from the right to give it position 1.
- Substituents: 3-bromo, 2-chloro.
- Alphabetical Order: Bromo comes before Chloro, hence 3-bromo-2-chlorobutanol.
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