Identify the reagent that confirms the presence of five $-\mathrm{OH}$ groups in glucose.
Identify the reagent that confirms the presence of five $-\mathrm{OH}$ groups in glucose.
$\mathrm{NH}_2 \mathrm{OH}$
$\mathrm{HCN}$
dil. $\mathrm{HNO}_3$
Acetic anhydride
Solution
Acetic anhydride \(\left(\left(\mathrm{CH}_3 \mathrm{CO}\right)_2 \mathrm{O}\right)\) is the reagent that confirms the presence of five hydroxyl (-OH) groups in glucose.
- Acetic anhydride is a colorless liquid that smells like acetic acid. It's commonly used as a reagent in organic synthesis.
- When glucose reacts with acetic anhydride, it undergoes acetylation to form glucose pentaacetate.
- The formation of glucose pentaacetate confirms the presence of five hydroxyl groups in glucose.
- The five hydroxyl groups are attached to different carbon atoms in glucose pentaacetate.