NEET 2025 · ChemistryPrevious Year Question
How many products (including stereoisomers) are expected from the monochlorination of 2-methylbutane, $\ce{(CH3)2CH-CH2-CH3}$?
- A.5
- B.6✓
- C.2
- D.3
Correct Answer
(B) 6
Solution & Explanation
\textbf{Answer:} (b) \textbf{Solution:} 2-Methylbutane ($\ce{C5H12}$) has four kinds of replaceable hydrogen, giving the constitutional monochloro products 1-chloro-2-methylbutane, 2-chloro-2-methylbutane, 2-chloro-3-methylbutane and 1-chloro-3-methylbutane. Two of these products (1-chloro-2-methylbutane and 2-chloro-3-methylbutane) contain a chiral carbon and therefore exist as a pair of enantiomers (R and S). Counting each enantiomer separately gives a total of 6 distinct products.
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