What are the properties of glucose?
Aug 26, 2022, 16:45 IST
Glucose Properties
Glucose has one aldehyde group, one primary and four secondary hydroxyl groups. It gives the following reactions:
(i) Acetylation:
(ii) Reaction with hydroxylamine/hydrogen cyanide:
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(iii) Glucose reduces ammoniacal silver nitrate solution and Fehling’s solution
(iv) Oxidation:
(v) Reduction:
(vi) D–Glucose reacts with phenyl hydrazine to give glucose phenylhydrazone. If excess of phenylhydrazine is used, a dihydrazone, known as osazone is formed.
(vii) On heating with concentrated solution of NaOH, glucose first turns yellow, then brown and finally resinifies. However, with dilute NaOH, glucose undergoes a reversible isomerization and is converted into a mixture of D–glucose, D–mannose and D–fructose.
Configuration of Glucose
The Fischer projections for D– and L– glucose are shown as:
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What are the properties of glucose? pdf
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