Question:

Identify 1 and 2 in the following reactions:

Updated On: Apr 3, 2025
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Solution and Explanation

Toluene (methylbenzene) is oxidized by KMnO4 to Benzoic Acid. The methyl group (-CH3) directly attached to the benzene ring is converted to a carboxylic acid group (-COOH).

(b) Reaction 2: Oxidation of Alkyl Benzene (Propylbenzene)

+ KMnO4/KOH, heat + H3O+ → Benzoic Acid

Propylbenzene is oxidized by KMnO4 to Benzoic Acid. The entire alkyl chain attached to the benzene ring is degraded and oxidized to a carboxylic acid (-COOH) group.

Answer: (E) Both reactions produce Benzoic Acid. Product 1 and Product 2 are both Benzoic Acid.

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Concepts Used:

Aromatic hydrocarbon

Aromatic hydrocarbons, sometimes known as arenes, are aromatic organic molecules made up entirely of carbon and hydrogen. In aromatic compounds a benzene ring which is named after the simple aromatic chemical benzene, or a phenyl group when part of a larger structure, is the configuration of six carbon atoms.

Read More: Aromaticity

Reactions of Aromatic Hydrocarbons:

1. Aromatic Substitution Reactions

This reaction involves the replacement of one substituent on the ring of an aromatic hydrocarbon, commonly a hydrogen atom, by a different substituent group.

The common types of aromatic substitution reactions are:

  • Nucleophilic aromatic substitution reactions
  • Electrophilic aromatic substitution reactions
  • Radical nucleophilic aromatic substitution reactions

2. Coupling Reactions

In these types of reactions, the coupling of two fragments that have a radical nature is achieved with the help of a metal catalyst