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प्रश्न
Write the equation involved in the following reaction:
Kolbe’s reaction
Explain the following with an example.
Kolbe’s reaction
उत्तर
Phenoxide ion generated by treating phenol with sodium hydroxide is even more reactive than phenol towards electrophilic aromatic substitution. Hence, it undergoes electrophilic substitution with carbon dioxide, a weak electrophile. Ortho hydroxybenzoic acid is formed as the main reaction product.
संबंधित प्रश्न
Give simple chemical tests to distinguish between the following pairs of compounds: Benzoic acid and Phenol
Write the final product(s) in each of the following reactions:
Write the main products when
2, 4, 6-trinitrochlorobenzene is subjected to hydrolysis
Write the main product(s) in each of the following reactions:
Write the structures of A, B, C, D and E in the following reactions:
While separating a mixture of ortho and para nitrophenols by steam distillation, name the isomer which will be steam volatile. Give reason.
Write the reaction involved in the following:
Friedal-Crafts Alkylation of Phenol
When phenol is treated with excess bromine water, it gives:
In the reaction of phenol with CHCl3 and aqueous NaOH at 343 K, the electrophile attacking the ring is:
Which of the following reactions is used to prepare salicylaldehyde?
Out of o-nitrophenol and p-nitrophenol, which is more volatile? Explain.
Which of the following is not aromatic?
Attacking species in nitration of benzene in presence of fuming HNO3 is
Write the chemical equation involved in the following reactions:
Acetylation of salicylic add
For the pair phenol and cyclohexanol, answer the following:
Give one chemical test to distinguish between the two.
Write the name of the reaction, structure and IUPAC name of the product formed when:
Phenol reacts with CHCl3 in the presence of NaOH followed by hydrolysis.
