Benzyl alcohol How phenol and anisole are differentiated

1. Sampling, add acid-base indicator, litmus: turn red, it is benzoic acid, acidic, and the rest of the substances can not make litmus red.

2. Sample the remaining three and add bromine water: benzyl alcohol is not dissolved when mixed and miscible and does not fade in bromine water; What is miscible and bromine water fades is benzaldehyde, that is, the aldehyde group is oxidized; The white precipitate is p-methylphenol, similar to the tribromophenol precipitate produced by phenol with bromine water.

Phenol can be identified first with NaOH because only phenol reacts with NaOH.

Benzyl alcohol and anisole can be identified with NA.

Iron chloride is added first, the purple is phenol, and then the water is added to stratify the anisole ether, and the water-soluble is benzyl alcohol.

Sampling dropwise distilled water cloudy is phenol.

Add acid potassium permanganate dropwise and the purple color fades to benzyl alcohol.

Differentiating benzyl alcohol, phenol, and anisole requires water and an acidic potassium permanganate solution.

1. First identify phenol:

Phenol was used to identify the solubility of water. Phenol is slightly soluble in water, and the solution becomes turbid when water is added; Whereas anisole and benzyl alcohol are soluble in water due to the presence of alcohol hydroxyl and ether groups, the solution will not appear turbid after adding water. Therefore, phenol can be identified by water.

2. Identify benzyl alcohol and anisole ether.

The oxidation of benzyl alcohol was used for identification. Benzyl alcohol can be oxidized by acidic potassium permanganate, causing the purple color of the solution to fade, while anisole does not have this property, so benzyl alcohol and anisole can be identified by adding a solution of acidic potassium permanganate.

Drops of ferric chloride are added separately.

solution, purple p-cresol. The remaining two were dropped into the acidic potassium permanganate solution, respectively.

The faded one is benzyl alcohol.

The one that does not fade is anisole .

p-2113 toluol was identified by Fe3+ first, and it was purple. There are three left. Benzyl alcohol was then identified with NA, and 5261 bubbles were released. There are two left. Benzoaldehyde was identified with acidic 4102kmNO4, and the solution faded.

The last one is benzyl 1653 ether or bromine water first, and the white precipitate is p-cresol. In the remaining two substances, sodium metal is added.

The one that produces the bubbles is benzyl alcohol, and the other is anisole ether.

1. Take four small amounts of test solutions, add FeCl3 to each, and p-cresol is blue-purple; The non-phenomenal ones are benzyl alcohol, benzaldehyde, and benzoic acid.

2. Benzyl alcohol, benzaldehyde, benzoic acid, plus NaHCO3, benzoic acid with CO2 bubbles, benzyl alcohol and benzaldehyde without bubbles.

3. The remaining benzyl alcohol and benzaldehyde can be identified by silver mirror reaction: add silver ammonia solution, benzaldehyde is reacted by silver mirror, and benzyl alcohol is not phenomenal.

Separately, the reagent was added and slightly heated, and the benzaldehyde produced by the silver mirror was benzaldehyde (Feilin reagent could not be used to identify aromatic aldehyde); Sodium metal is added to the remaining two, and the bubbles produce benzyl alcohol, and the other is acetophenone.

Take a small amount of each of the two carbonyl compounds and put them in the test tube, add Toren reagent (ammonia solution of silver hydroxide) each, heat them on a water bath, and the aldehyde generated by the silver mirror is benzaldehyde, that is, benzaldehyde, and the acetophenone generated without the silver mirror is acetophenone.

Take a small amount of each of the two alcohols and phenols and put them in the test tube, add a few drops of ferric chloride solution each, and the blue-purple color is benzophenol, and the blue-purple is benzyl alcohol.

Concentrated bromine water was added separately, and the white precipitate was phenol, and the faded was benzyl alcohol.

When FeCl3 is added, the solution turns purple with phenol, and with no change is benzyl alcohol. Absolutely slippery.

Phenol (C6H5OH) is a colorless needle-like crystal with a special odor, which is toxic and is an important raw material for the production of certain resins, fungicides, preservatives and drugs (such as aspirin). It can also be used for the treatment of sterilized surgical instruments and excrement, **sterilization, itching and otitis media. Melting point 43, slightly soluble in water at room temperature, soluble in organic solvents; When the temperature is higher than 65, it can be miscible with water in any proportion.

Phenol is corrosive, and after contact, it will denature the local protein, and its solution can be washed with alcohol when it touches the **. A small part of phenol is exposed to the air and is oxidized by oxygen to quinone, giving it a pink-orange color. When ferric ions turn purple, this method is usually used to test phenol.

Benyl alcohol is one of the simplest aromatic alcohols and can be seen as phenyl-substituted methanol. It is mostly found in essential oils in the form of esters in nature, such as jasmine oil, hyacinth oil and Peruvian balm.

The chemical method of distinguishing anisole and p-methylphenol is to see if it can react with sodium hydroxide water in solution. A solution is made up of at least two substances.

1. A stable mixture in which the dispersed substance (solute) is dispersed in molecules or smaller particles in another substance (solvent).

Anisole is an ether that is insoluble in water; As a phenol, p-methylphenol can react with sodium hydroxide to form a salt and then dissolve in water.

Whether it can react with sodium hydroxide aqueous solution.

Anisole is an ether that is insoluble in water;

As a phenol, p-methylphenol can react with sodium hydroxide to form a salt and then dissolve in water.

Oxidants can be used because phenols are susceptible to oxidation.