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Question

Name the reagents used in the following reactions:
(i) Oxidation of a primary alcohol to carboxylic acid.
(ii) Oxidation of a primary alcohol to aldehyde.
(iii) Bromination of phenol to 2,4,6-tribromophenol.
(iv) Benzyl alcohol to benzoic acid.
(v) Dehydration of propan-2-ol to propene.
(vi) Butan-2-one to butan-2-ol.

Solution
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(i) Oxidation of primary alcohol to carboxylic acid.
Acidified K2Cr2O7 or acidified KMnO4

(ii) Oxidation of primary alcohol to aldehyde.
Pyridinium chlorochromate (PCC) in CH2Cl2 or Pyridinimium dichromate (PDC) in CH2Cl2

(iii) Bromination of phenol to 2,4,6-tribromophenol.
Aqueous bromine ( or bromine water)

(iv) Benzyl alcohol to benzoic acid.
Acidified or alkaline KMnO4 followed by hydrolysis with dil H2SO4

(v) Dehydration of propan-2-ol to propene.
85% phosphoric acid

(vi) Butan-2-one to butan-2-ol.
NaBH4 or Ni/H2

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Q1

Name the reagents used in the following reactions:

(i) Oxidation of a primary alcohol to carboxylic acid.

(ii) Oxidation of a primary alcohol to aldehyde.

(iii) Bromination of phenol to 2,4,6-tribromophenol.

(iv) Benzyl alcohol to benzoic acid.

(v) Dehydration of propan-2-ol to propene.

(vi) Butan-2-one to butan-2-ol.

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Q2

Name the reagents used in the following reactions
Oxidation of a primary alcohol to carboxylic acid.

Oxidation of a primary alcohol to aldehyde

Bromination of phenol to 2, 4, 6 - tribromophenol

Benzyl alcohol to benzoic acid

Dehydration of propan-2-ol to propene

Butan-2-one to butan-2-ol

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Name the reagent used in oxidation of a primary alcohol to aldehyde.
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