How many products (including stereoisomers) are expected from monochlorination of the following compound?(CH_3)_2CH-CH_2-CH_3

How many products (including stereoisomers) are expected from monochlorination of the following compound?

\((\mathrm{CH_3})_2\mathrm{CH-CH_2-CH_3}\)

2-methylbutane drawn as (CH3)2CH-CH2-CH3

1. 2

2. 3

3. 5

4. 6

Doubtly Asked 30 Oct 2026 NEET UG 2025 Practice test neet Save WhatsApp Report

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Answer: 4. 6

Key idea: count the distinct kinds of hydrogen in 2-methylbutane, then count stereoisomers.

Two equivalent \(\mathrm{CH_3}\) on C-2: 1-chloro-2-methylbutane, has a chiral centre, 2 isomers.
C-2 H (tertiary): 2-chloro-2-methylbutane, 1.
C-3 \(\mathrm{CH_2}\): 2-chloro-3-methylbutane, chiral, 2.
C-4 \(\mathrm{CH_3}\): 1-chloro-3-methylbutane, 1.

Total = 2 + 1 + 2 + 1 = 6: option (4).

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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