Which of the following reactions is suitable to convert phenol to salicylaldehyde?
The reaction is popularly known as the Reimer Tiemann reaction. A common example of the Reimer Tiemann reaction is the conversion of phenol to salicylaldehyde (2-hydroxy benzaldehyde) as shown below.
How is phenol converted into picric acid salicylaldehyde?
Direct nitration of phenol with conc . HNO3 and conc . H2SO4 gives picric acid .
How is phenol converted to salicylic acid?
Phenol is converted to salicylic acid by Reimer-Tiemann reaction. In this reaction, ortho hydroxyl benzaldehyde and ortho hydroxyl benzoic acid are obtained.
How will you convert phenol into?
Phenol can be converted to benzene by using strong reducing agents like Zn dust with strong heating. When strongly heated,the phenol gets converted into phenoxide ion and proton thus released accepts an electron from Zn forming H radical.
How is salicylaldehyde formed?
Salicylaldehyde is prepared by heating phenol and chloroform together in the presence of potassium hydroxide and sodium hydroxide. This reaction is called the Relmer-Tiemann reaction. The correct option is Option C, Reimer-Tiemann reaction.
How do you convert phenol to phenolphthalein?
Phenol is heated with phthalic anhydride in the presence of conc. H2SO4 to give phenolphthalein.
How do you convert phenol to picric acid?
When phenol is treated with hot conc. nitric acid in the presence of conc. sulphuric acid yellow coloured picric acid is produced.
How do you make picric acid from phenol?
Picric acid: Picric acid is basically prepared from phenol by reacting phenol with concentrated sulphuric acid and concentrated nitric acid. The nitro groups from nitric acid attacks on ortho and para positions which is the best suitable and stable position for the newly formed compound which is picric acid.
How will you convert phenol to salicylic acid and salicylaldehyde?
In the last, we can conclude that conversion of phenol to salicylic acid and to salicylaldehyde are known as Kolbe’ reaction, and Riemer-Tiemann reaction. Hence, the correct option is (D).
How do you convert phenol to salicylic acid give equation?
First you react phenol with CCl4 in presence of alkali NaOH/KOH, or react with CO2 gas at 120 C(rxn called Kolbes rxn) ,that rxn is called Reimer-Tiemann rxn then you get Salicyclic acid. For, aspirin, react salicylic acid with acetyl chloride or acetic anhydride then you get aspirin.
How will you convert phenol into benzene write the reaction?
- Benzene can be formed by the reaction of phenol with : Hard.
- Phenol on distilling with zinc dust gives: Hard.
- Benzoic acid gives benzene on being heated with ′X′ and phenol gives benzene on being heated with ′Y′.
- When phenol is distilled with Zn-dust, it gives:
- How is toluene obtained form phenol?
How phenol is converted into benzene write its equation?
Phenol gives out proton and forms phenoxy anion. This anion later gives out oxygen radical to form phenyl – free radical. On the other hand, zinc reacts with the oxygen radicals to form Zinc Oxide (ZnO). Finally, hydrogen free radical (formed from hydrogen ion) joins with phenyl – free radical to form Benzene.