Admin Table of Contents
- 1 Which solvent is used in preparation of Glucosazone from glucose?
- 2 Which of the following chemical are required for the preparation of Glucosazone?
- 3 How many phenylhydrazine molecules are used in preparation of osazone?
- 4 What happens when fructose reacts with phenylhydrazine?
- 5 How many molecules of phenylhydrazine are used?
- 6 How do you dissolve phenylhydrazine?
- 7 When glucose is treated with one mole of phenylhydrazine then the product formed is?
- 8 How is phenylhydrazine prepared to be soluble in water?
- 9 How is phenyl hydrazine used to identify reducing sugars?
- 10 How is phenyl hydrazine used in the synthesis of indoles?
Which solvent is used in preparation of Glucosazone from glucose?
D-glucose reacts with phenylhydrazine to give glucosazone. The same product is obtained from fructose and mannose.
Which of the following chemical are required for the preparation of Glucosazone?
Phenylhydrazine under Fischer indole synthesis produces indoles. In this reaction one molecule of glucose reacts with two molecules of phenyl hydrazine to create glucosazone.
What are the composition of phenylhydrazine mixture?
Phenylhydrazine is prepared by oxidizing aniline with sodium nitrite in the presence of hydrogen chloride to form the diazonium salt, which is subsequently reduced using sodium sulfite in the presence of sodium hydroxide to form the final product.
How many phenylhydrazine molecules are used in preparation of osazone?
In osazone formation of three molecules of phenylhydrazine which is the correct statement.
What happens when fructose reacts with phenylhydrazine?
The osazone is an oxidation product. Effectively, the C2 hydroxyl group of the phenylhydrazones has been oxidized to a ketone level removing the C2 stereochemistry. In addition the C1 hydroxyl of the fructose phenylhydrazone is oxidized to the level of an aldehyde.
What is Glucosazone formation?
Glucosazone is a simple substitution reaction of osazone in the place of Aldehyde group in Glucose. When glucose is treated with osazone gives Glucosazone.
How many molecules of phenylhydrazine are used?
three molecules
Hence, three molecules of phenyl hydrazine is used to yield osazone.
How do you dissolve phenylhydrazine?
Procedure: Weigh 0.1663g of phenylhydrazine hydrochloride, dissolve in a small beaker and transfer to a 50 ml volumetric flask. Top up to volume with distilled water. Weigh 0.835g potassium ferricyanide and transfer to a 50 ml volumetric flask, dissolve and make up to volume with distilled water.
What is the structure of phenylhydrazine hydrochloride?
Phenylhydrazine hydrochloride | C6H8N2. ClH – PubChem.
When glucose is treated with one mole of phenylhydrazine then the product formed is?
Glucose reacts with three molecules of phenyl hydrazine and form glucosazone.
How is phenylhydrazine prepared to be soluble in water?
It is sparingly soluble in water. Phenylhydrazine is prepared by oxidizing aniline with sodium nitrite in the presence of hydrogen chloride to form the diazonium salt, which is subsequently reduced using sodium sulfite in the presence of sodium hydroxide to form the final product.
How to make phenylhydrazine with glacial acetic acid?
Five milliliters of the sugar solution are acidified with 10 drops of glacial acetic acid, a pinch of phenylhydrazine powder, and 0.1 g of solid sodium acetate. The mixture is then warmed in a boiling water bath for 10 min with occasional shaking and filtered.
How is phenyl hydrazine used to identify reducing sugars?
Compounds containing the CO CHOH group form crystalline osazones with phenyl hydrazine with characteristic shapes and melting points. This can be used as a better method by which to identify a reducing sugar. Phenyl hydrazine reacts with the carbonyl group of the sugar, resulting in the formation of phenylhydrazone and the osazone (Figure 9 ).
How is phenyl hydrazine used in the synthesis of indoles?
Phenyl-hydrazine is used to prepare indoles via the Fischer Indole Synthesis, which are intermediates in the synthesis of various dyes and pharmaceuticals.