Common questions

What happens when phenol react with NaOH?

What happens when phenol react with NaOH?

Phenol reacts with sodium hydroxide solution to give a colourless solution containing sodium phenoxide. In this reaction, the hydrogen ion has been removed by the strongly basic hydroxide ion in the sodium hydroxide solution.

Which will yield phenol by reacting with caustic soda?

In this process, benzene sulfonic acid is reacted with aqueous sodium hydroxide. The resulting salt is mixed with solid sodium hydroxide and fused at a high temperature. The product of this reaction is sodium phenoxide, which is acidified with aqueous acid to yield phenol.

What is the name of the product formed when phenol is treated with aq NaOH and chcl3?

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

Why does phenol dissolve in NaOH?

Why phenols are soluble in alkalies? Answer: Phenols show acidic nature and hence are soluble in alkalies like NaOH, Na2CO3 etc. The acidic nature is due to formation of resonance stabilized phenoxide ion formed by losing a proton from -OH group.

What product is obtained when phenol is treated with NaOH?

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

What happens when phenol is treated with br2?

Polyhalogen derivatives are given when Phenol is treated with bromine water, in which all the H-atoms present at the o- and p- positions are substituted by Bromine with respect to the -OH group. Phenol produces a white precipitate of 2,4,6-tribromophenolol when combined with excess bromine water.

What happens when phenol is treated with br2 cs2?

(i) When the reaction is carried out in solvents of low polarity such as CHCl3 or CS2 and at low temperature, monobromophenols are formed. (ii) When phenol is treated with bromine water, 2,4,6- tribromophenol is formed as white precipitate.

Which the following will give phenol with CaO and NaOH?

salicylic acid
Only salicylic acid (2-Hydroxybenzoic acid) on decarboxylation gives phenol. Complete answer: We must know that salicylic acid will give phenol with \[{\text{CaO}}\] and \[{\text{NaOH}}\].

What is the product of bromination of phenol?

So, the bromination of phenol gives p-bromophenol and o-bromophenol.

Why are phenols soluble in NaOH and not in NaHCO3?

Phenols are less acidic than carboxylic acids and do not react with NaHCO3 to form water-soluble salts. As a result, phenols are insoluble in 5% NaCHO3.

What is the major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide?

Phenol reacts with sodium hydroxide to give sodium phenoxide. Phenoxide ion undergoes electrophilic substitution with carbon dioxide ( a weak electrophile) because phenoxide ion is more reactive than phenol. Salicylic acid is formed as a major product.

Which of the following will give phenol when treated with NaOH and CaO?

What is Friedel-Crafts alkylation of benzene?

The Friedel-Crafts alkylation reaction of benzene is illustrated below. A Lewis acid catalyst such as FeCl 3 or AlCl 3 is employed in this reaction in order to form a carbocation by facilitating the removal of the halide.

How do you avoid Polyalkylation in Friedel Craft reactions?

An excess of the aromatic compound must be used in these reactions in order to avoid polyalkylation (addition of more than one alkyl group to the aromatic compound). Aromatic compounds that are less reactive than mono-halobenzenes do not participate in the Friedel-Crafts alkylation reaction.

What are the two primary types of Friedel-Crafts reactions?

The two primary types of Friedel-Crafts reactions are the alkylation and acylation reactions. These reactions were developed in the year 1877 by the French chemist Charles Friedel and the American chemist James Crafts.

What is the substitute for acyl halide in Friedel Crafts acylation?

An acid anhydride can be used as an alternative to the acyl halide in Friedel-Crafts acylations. The halogen belonging to the acyl halide forms a complex with the Lewis acid, generating a highly electrophilic acylium ion, which has a general formula of RCO + and is stabilized by resonance.