The IUPAC name of the compound CH3CH2CH(OH)CH3 is: — Solution | JEE Chemistry

MCQEasyJEE 2024Nomenclature (IUPAC & Common)

The IUPAC name of the compound CH3CH2CH(OH)CH3 is:

A
$1\text{-Butanol}$
B
$2\text{-Butanol}$
C
$\text{tert-Butanol}$
D
$\text{Isobutanol}$

Answer

Correct answer:B

Step-by-step solution

Standard Method

Given: The compound is CH3CH2CH(OH)CH3.

Find: Its correct IUPAC name among the given options.

The solution appears to discuss a different question involving a cyclohexane derivative, but it explicitly states that the correct option is B. Using that conclusion together with the given compound, the parent chain contains $4$ carbon atoms, so the base name is butane. The hydroxyl functional group gets priority in numbering, and numbering from the nearer end places OH at carbon $2$ .

Therefore, the IUPAC name is $2\text{-Butanol}$ .

The correct option is B.

Common mistakes

Choosing $1\text{-Butanol}$ by numbering the chain from the wrong end. The OH group must get the lowest possible locant. Number from the nearer end so the alcohol is at carbon $2$ , not carbon $1$ .
Confusing CH3CH2CH(OH)CH3 with tert-Butanol. tert-Butanol has a different carbon skeleton with the OH group on a tertiary carbon. First identify the actual continuous chain before naming.
Selecting Isobutanol from a common-name pattern match. Common names depend on branching, and this structure is not isobutyl alcohol. Use IUPAC rules based on the longest chain and the principal functional group position instead.

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Answer

Step-by-step solution

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