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Topic: Nomenclature (trivial and IUPAC)· Some Basic Principles of Organic Chemistry

The correct IUPAC name of the following compound is :[skeletal structure with Cl, OH, Br and a methyl branch]

The correct IUPAC name of the following compound is :

[skeletal structure with Cl, OH, Br and a methyl branch]

skeletal structure with Cl, OH, Br substituents

1. 6-bromo-4-methyl-2-chlorohexan-4-ol

2. 1-bromo-5-chloro-4-methylhexan-3-ol

3. 6-bromo-2-chloro-4-methylhexan-4-ol

4. 1-bromo-4-methyl-5-chlorohexan-3-ol

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Answer: 2. 1-bromo-5-chloro-4-methylhexan-3-ol

Key idea: choose the longest chain containing the -OH group, give -OH the lowest locant, then name substituents alphabetically.

The compound is \(\mathrm{CH_3CHCl{-}CH(CH_3){-}CH(OH){-}CH_2CH_2Br}\). The longest chain has 6 C (hexane). Numbering from the Br end puts OH at C-3 (from the other end it would be C-4), so: C1 Br, C3 OH, C4 methyl, C5 Cl.

Name: 1-bromo-5-chloro-4-methylhexan-3-ol, in alphabetical order bromo, chloro, methyl. Option 2.

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