Question

Write the main product in each of the following reactions: \vspace{0.5cm} \includegraphics[width=10cm]{26B.png}

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

For the given reactions: - (i) The oxidation of the hydroboration product with hydrogen peroxide (\(\text{H}_2\text{O}_2\)) and hydroxide (\(\text{OH}^-\)) leads to the formation of a diol.
The main product will be (CH3}–CH2}–CH2}–CH2}OH), 1-propanol. - (ii) Phenol (C6}H5}OH) reacts with aqueous NaOH to form phenoxide ion (C6}H5}O\textsuperscript{−}). When phenol reacts with CO2} in the presence of H\textsuperscript{+}, it undergoes carboxylation to form salicylic acid (2-hydroxybenzoic acid). \[ \text{Main product:} \, \text{Salicylic acid (C6}H4}(OH)COOH)} \]