What happens when phenol is treated with I aqueous bromine?

When Phenol is treated with bromine water gives polyhalogen derivatives in which all the H-atoms present at the o- and the p- positions with respect to the -OH group are replaced by Bromine.

What happens when bromination of phenol take place?

We know that the reaction of phenol and water with bromine is known as bromination of phenol. It is so because in aqueous medium phenol ionizes to form peroxide ion. Due to the presence of negative ions the ring gets highly activated and tri substitution occurs and the formation of 2,4,6 – tribromophenol takes place.

Does phenol show bromine water test?

Summary. The bromine water test is focused on the determination of saturated or unsaturated hydrocarbons. Organic compounds like phenols, alkenes, acetyl compounds and anilines will readily undergo bromine water tests.

When phenol is treated with bromine water white precipitate is obtained?

2, 4, 6 -tribromophenol
Phenol on reaction with excess of bromine water gives a white precipitate of 2, 4, 6 -tribromophenol.

What happens when phenol reacts with bromine water class 12?

When phenol reacts with bromine water 2,4,6- tribromophenol is formed. Bromine water is decolourises and a white precipitate is formed.

How does phenol react with Br2 in CS2 and bromine water?

With Br2 – H2O , phenol give s 2,4,6 – tribromophenol but with Br – CS2 , it gives 4 – bromophenol as the major product.

What happens when phenol react with?

When phenol reacts with NaOH (sodium hydroxide), sodium phenoxide is formed.

Does Br2 react with phenol?

Phenol produces a white precipitate of 2,4,6-tribromophenolol when combined with excess bromine water. In order to have 2,4,6-tribromophenol, phenol reacts with bromine water. To form phenoxide ion, phenol is ionised, which is much stronger for directing ortho-para.

What will be the product’s formed when Phenol reacts with bromine at low temperature?

o and p-bromophenol.

When Phenol is treated with chcl3 and NaOH the product formed is?

When phenol is treated with CHCl3 and NaOH the product formed is salicylaldehyde, this reaction is known as Reimer-Tiemann reaction.

What happens when phenol is added to bromine water?

If bromine water is added to a solution of phenol in water, the bromine water is decolourised and a white precipitate is formed which smells of antiseptic. Notice the multiple substitutions around the ring – into all the activated positions. (The 6- position is, of course, just the same as the 2- position.

What happens when benzene reacts with bromine water?

The reaction mechanism is electrophilic substitution. By contrast, benzene does not react with bromine water as it can’t polarise a bromine water (liquid bromine and a catalyst are required) while ethene reacts by electrophilic addition rather than substitution. 25 insanely cool gadgets selling out quickly in 2021.

What happens when Phenol reacts with sodium hydroxide?

Phenol is a very weak acid and sodium hydroxide, NaOH, is a strong alkali so they will react. Using the general equation for all neutralisation reactions we say that an acid + base makes a salt and water. I’ve used this to show the phenol loses a proton and bonds with the sodium ionically.

What happens when Phenol reacts with FeCl3 solution?

Phenol, an aromatic alcohol readily react with aqueous FeCl3 solution to give violet coloration.On the other hand no aliphatic alcohol (e.g. ethyl alcohol, methyl alcohol etc) will not react with FeCl3 solution. On treatment with aqueous Br2 phenol gives white precipitate of 2,4,6-tribromophenol.