Question

Write the main product in each of the following reactions: 

Hint:

In reactions of alcohols and phenols, the product formation can be understood by considering the reactivity of the hydroxyl group (-OH) with reagents such as borane, hydrogen peroxide, or carboxylic acids.

Answer 1

The following reactions are described:

(i) Hydroboration product oxidation using hydrogen peroxide (H₂O₂) and hydroxide (OH⁻) yields a diol. The primary product is CH₃–CH₂–CH₂–CH₂OH, which is 1-propanol.

(ii) Phenol (C₆H₅OH) reacts with aqueous NaOH to produce the phenoxide ion (C₆H₅O⁻). Subsequent reaction of phenol with CO₂ under acidic conditions (H⁺) results in carboxylation, forming salicylic acid (2-hydroxybenzoic acid).

Main product: Salicylic acid (C₆H₄(OH)COOH)