Question

An unknown alcohol is treated with the “Lucas reagent” to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism

Secondary alcohol by S_N1

Tertiary alcohol by S_N1

Secondary alcohol by S_N2

Tertiary alcohol by S_N2

Solution

Tertiary alcohol by S_N1

Reaction proceeds through carbocation formation as 3⁰ carbocation is highly stable, hence reaction proceeds through S_N1 with 3⁰ alcohol.

Some More Questions From Haloalkanes and Haloarenes Chapter

Write structures of the following compounds:
2-chloro-3-methylpentane

Write structures of the following compounds:
1-chloro-4-ethylcyclohexane

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Haloalkanes And Haloarenes

An unknown alcohol is treated with the “Lucas reagent” to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism

Secondary alcohol by S_N1

Tertiary alcohol by S_N1

Secondary alcohol by S_N2

Tertiary alcohol by S_N2

Some More Questions From Haloalkanes and Haloarenes Chapter

Write structures of the following compounds:
2-chloro-3-methylpentane

Write structures of the following compounds:
1-chloro-4-ethylcyclohexane

Write structures of the following compounds:
4-tert-Butyl-3-iodohaptane

Write structures of the following compounds:
1, 4-Dibromo but-2-ene

Write structures of the following compounds:
1-Bromo-4-sec butyl-2-methyl benzene.

Why is sulphuric acid not used during the reaction of alcohols with KI?

Write structures of different dihalogen derivatives of propane.

Among the isomeric alkanes of molecular formula C₅H₁₂, identify the one that on photochemical chlorination yields:

i) A single monochloride.

Among the isomeric alkanes of molecular formula C₅H₁₂, identify the one that on photochemical chlorination yields:

i)Three isomeric monochlorides.

Among the isomeric alkanes of molecular formula C₅H₁₂, identify the one that on photochemical chlorination yields:
Four isomeric monochlorides.

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NCERT Sample Papers

Entrance Exams Preparation

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Haloalkanes And Haloarenes

An unknown alcohol is treated with the “Lucas reagent” to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism Secondary alcohol by SN1 Tertiary alcohol by SN1 Secondary alcohol by SN2 Tertiary alcohol by SN2

Some More Questions From Haloalkanes and Haloarenes Chapter

Write structures of the following compounds:2-chloro-3-methylpentane

Write structures of the following compounds:1-chloro-4-ethylcyclohexane

Write structures of the following compounds:4-tert-Butyl-3-iodohaptane

Write structures of the following compounds:1, 4-Dibromo but-2-ene

Write structures of the following compounds:1-Bromo-4-sec butyl-2-methyl benzene.

Why is sulphuric acid not used during the reaction of alcohols with KI?

Write structures of different dihalogen derivatives of propane.

Among the isomeric alkanes of molecular formula C5H12, identify the one that on photochemical chlorination yields:i) A single monochloride.

Among the isomeric alkanes of molecular formula C5H12, identify the one that on photochemical chlorination yields:i)Three isomeric monochlorides.

Among the isomeric alkanes of molecular formula C5H12, identify the one that on photochemical chlorination yields:Four isomeric monochlorides.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

An unknown alcohol is treated with the “Lucas reagent” to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism

Secondary alcohol by S_N1

Tertiary alcohol by S_N1

Secondary alcohol by S_N2

Tertiary alcohol by S_N2

Write structures of the following compounds:
2-chloro-3-methylpentane

Write structures of the following compounds:
1-chloro-4-ethylcyclohexane

Write structures of the following compounds:
4-tert-Butyl-3-iodohaptane

Write structures of the following compounds:
1, 4-Dibromo but-2-ene

Write structures of the following compounds:
1-Bromo-4-sec butyl-2-methyl benzene.

Among the isomeric alkanes of molecular formula C₅H₁₂, identify the one that on photochemical chlorination yields:

i) A single monochloride.

Among the isomeric alkanes of molecular formula C₅H₁₂, identify the one that on photochemical chlorination yields:

i)Three isomeric monochlorides.

Among the isomeric alkanes of molecular formula C₅H₁₂, identify the one that on photochemical chlorination yields:
Four isomeric monochlorides.