Write a Chemical Reaction to Show that the Open Structure of D-glucose Contains the Following : Aldehyde as a Carbonyl Group - Chemistry

Question

Write a chemical reaction to show that the open structure of D-glucose contains the following :

Aldehyde as a carbonyl group

Solution

Glucose gets oxidized to six carbon carboxylic acid (gluconic acid) on reaction with a mild oxidizing agent like bromine water. This indicates that the carbonyl group is present as an aldehydic group

$\begin{array}{cc} \phantom{..}\ce{CHO}\phantom{...........} \ce{COOH}\phantom{...}\\ \phantom{......}|\phantom{.................}|\phantom{............}\\ \ce{(CHOH) ->[Br2/H2O][{[O]}](CHOH)4}\\ \phantom{..}|\phantom{.................}|\phantom{.......}\\ \phantom{..}\ce{\underset{\text{Glucose}}{CH2OH}} \phantom{.........}\ce{\underset{\text{Gluconic acid}}{CH2OH}} \end{array}$

Concept: Aldehydes and Ketones - Structure of the Carbonyl Group
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