Chemistry - ALCOHOL & ETHER Question with Solution | TestHub

Question Explanation:

The question asks for the product P formed when a cyclic triol reacts with ${\mathrm{HIO}}_4$.

Concept:

This question is based on oxidative cleavage of vicinal diols.

Solution:

Periodic acid ( ${\mathrm{HIO}}_4$ ) selectively cleaves the $\mathrm{C}-\mathrm{C}$ bond of vicinal diols (adjacent - OH groups). This cleavage forms carbonyl compounds.

In the given molecule, the -OH groups at positions 1 and 2 are vicinal.

The -OH at position 4 is isolated and does not react.

Cleavage of the C1-C2 bond occurs.

The secondary alcohols at C1 & C2 are converted into an aldehyde.