For the formation of glucasozone how many phenyl hydrazine molecules react with one molecules of glucose

Options

A. 1
B. 2
C. 3
D. 4

Answer

To determine how many phenylhydrazine molecules react with one molecule of glucose to form glucosazone, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Reaction**: The reaction involves glucose (a carbohydrate) reacting with phenylhydrazine, which is a reagent used to form hydrazones from carbonyl compounds.

2. **Drawing the Structure of Glucose**: Start by drawing the structure of glucose. Glucose is an aldohexose with the formula C₆H₁₂O₆. It has an aldehyde group at one end and multiple hydroxyl groups.

3. **First Reaction with Phenylhydrazine**: The first phenylhydrazine molecule (C₆H₅NH-NH₂) reacts with the carbonyl group (aldehyde) of glucose. During this reaction, a water molecule (H₂O) is eliminated, resulting in the formation of a hydrazone.

4. **Tautomerization**: The formed hydrazone undergoes tautomerization, where the structure rearranges to form an imine. This involves the migration of hydrogen atoms and the formation of double bonds.

5. **Second Reaction with Phenylhydrazine**: A second phenylhydrazine molecule then reacts with the nitrogen of the imine formed in the previous step. Again, water is eliminated during this reaction.

6. **Third Reaction with Phenylhydrazine**: The third phenylhydrazine molecule reacts with the carbonyl group of the intermediate formed. This reaction also results in the elimination of water.

7. **Formation of Glucosazone**: After the three reactions, the final product, glucosazone, is formed. The structure of glucosazone contains three phenylhydrazine units attached to the glucose molecule.

8. **Conclusion**: Therefore, the total number of phenylhydrazine molecules that react with one molecule of glucose to form glucosazone is **3**.

### Final Answer:
**3 molecules of phenylhydrazine react with 1 molecule of glucose to form glucosazone.**

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